CVE-2026-20021 (GCVE-0-2026-20021)
Vulnerability from cvelistv5 – Published: 2026-03-04 18:35 – Updated: 2026-03-04 21:30
VLAI?
Summary
A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.
This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.
Severity ?
4.3 (Medium)
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco Secure Firewall Adaptive Security Appliance (ASA) Software |
Affected:
9.12.1
Affected: 9.12.1.2 Affected: 9.12.1.3 Affected: 9.12.2 Affected: 9.12.2.4 Affected: 9.12.2.5 Affected: 9.12.2.9 Affected: 9.12.3 Affected: 9.12.3.2 Affected: 9.12.3.7 Affected: 9.12.4 Affected: 9.12.3.12 Affected: 9.12.3.9 Affected: 9.12.2.1 Affected: 9.12.4.2 Affected: 9.12.4.4 Affected: 9.12.4.7 Affected: 9.12.4.10 Affected: 9.12.4.13 Affected: 9.12.4.8 Affected: 9.12.4.18 Affected: 9.12.4.24 Affected: 9.12.4.26 Affected: 9.12.4.29 Affected: 9.12.4.30 Affected: 9.12.4.35 Affected: 9.12.4.37 Affected: 9.12.4.38 Affected: 9.12.4.39 Affected: 9.12.4.40 Affected: 9.12.4.41 Affected: 9.12.4.47 Affected: 9.12.4.48 Affected: 9.12.4.50 Affected: 9.12.4.52 Affected: 9.12.4.54 Affected: 9.12.4.55 Affected: 9.12.4.56 Affected: 9.12.4.58 Affected: 9.12.4.62 Affected: 9.12.4.65 Affected: 9.12.4.67 Affected: 9.16.1 Affected: 9.16.1.28 Affected: 9.16.2 Affected: 9.16.2.3 Affected: 9.16.2.7 Affected: 9.16.2.11 Affected: 9.16.2.13 Affected: 9.16.2.14 Affected: 9.16.3 Affected: 9.16.3.3 Affected: 9.16.3.14 Affected: 9.16.3.15 Affected: 9.16.3.19 Affected: 9.16.3.23 Affected: 9.16.4 Affected: 9.16.4.9 Affected: 9.16.4.14 Affected: 9.16.4.19 Affected: 9.16.4.27 Affected: 9.16.4.38 Affected: 9.16.4.39 Affected: 9.16.4.42 Affected: 9.16.4.48 Affected: 9.16.4.55 Affected: 9.16.4.57 Affected: 9.16.4.61 Affected: 9.16.4.62 Affected: 9.16.4.67 Affected: 9.16.4.70 Affected: 9.16.4.71 Affected: 9.16.4.76 Affected: 9.16.4.82 Affected: 9.16.4.84 Affected: 9.16.4.85 Affected: 9.17.1 Affected: 9.17.1.7 Affected: 9.17.1.9 Affected: 9.17.1.10 Affected: 9.17.1.11 Affected: 9.17.1.13 Affected: 9.17.1.15 Affected: 9.17.1.20 Affected: 9.17.1.30 Affected: 9.17.1.33 Affected: 9.17.1.39 Affected: 9.17.1.45 Affected: 9.17.1.46 Affected: 9.18.1 Affected: 9.18.1.3 Affected: 9.18.2 Affected: 9.18.2.5 Affected: 9.18.2.7 Affected: 9.18.2.8 Affected: 9.18.3 Affected: 9.18.3.39 Affected: 9.18.3.46 Affected: 9.18.3.53 Affected: 9.18.3.55 Affected: 9.18.3.56 Affected: 9.18.4 Affected: 9.18.4.5 Affected: 9.18.4.8 Affected: 9.18.4.22 Affected: 9.18.4.24 Affected: 9.18.4.29 Affected: 9.18.4.34 Affected: 9.18.4.40 Affected: 9.18.4.47 Affected: 9.18.4.50 Affected: 9.18.4.52 Affected: 9.18.4.53 Affected: 9.18.4.57 Affected: 9.18.4.66 Affected: 9.18.4.67 Affected: 9.18.4.68 Affected: 9.19.1 Affected: 9.19.1.5 Affected: 9.19.1.9 Affected: 9.19.1.12 Affected: 9.19.1.18 Affected: 9.19.1.22 Affected: 9.19.1.24 Affected: 9.19.1.27 Affected: 9.19.1.28 Affected: 9.19.1.31 Affected: 9.19.1.37 Affected: 9.19.1.38 Affected: 9.19.1.42 Affected: 9.20.1 Affected: 9.20.1.5 Affected: 9.20.2 Affected: 9.20.2.10 Affected: 9.20.2.21 Affected: 9.20.2.22 Affected: 9.20.3 Affected: 9.20.3.4 Affected: 9.20.3.7 Affected: 9.20.3.9 Affected: 9.20.3.10 Affected: 9.20.3.13 Affected: 9.20.3.16 Affected: 9.20.3.20 Affected: 9.20.4 Affected: 9.20.4.7 Affected: 9.20.4.10 Affected: 9.20.4.14 Affected: 9.22.1.1 Affected: 9.22.1.3 Affected: 9.22.1.2 Affected: 9.22.1.6 Affected: 9.22.2 Affected: 9.22.2.4 Affected: 9.22.2.9 Affected: 9.22.2.13 Affected: 9.22.2.14 Affected: 9.23.1 Affected: 9.23.1.3 Affected: 9.23.1.7 Affected: 9.23.1.13 Affected: 9.23.1.19 Affected: 9.23.1.22 |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-20021",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-04T21:29:56.096429Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T21:30:11.471Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Cisco Secure Firewall Adaptive Security Appliance (ASA) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "9.12.1"
},
{
"status": "affected",
"version": "9.12.1.2"
},
{
"status": "affected",
"version": "9.12.1.3"
},
{
"status": "affected",
"version": "9.12.2"
},
{
"status": "affected",
"version": "9.12.2.4"
},
{
"status": "affected",
"version": "9.12.2.5"
},
{
"status": "affected",
"version": "9.12.2.9"
},
{
"status": "affected",
"version": "9.12.3"
},
{
"status": "affected",
"version": "9.12.3.2"
},
{
"status": "affected",
"version": "9.12.3.7"
},
{
"status": "affected",
"version": "9.12.4"
},
{
"status": "affected",
"version": "9.12.3.12"
},
{
"status": "affected",
"version": "9.12.3.9"
},
{
"status": "affected",
"version": "9.12.2.1"
},
{
"status": "affected",
"version": "9.12.4.2"
},
{
"status": "affected",
"version": "9.12.4.4"
},
{
"status": "affected",
"version": "9.12.4.7"
},
{
"status": "affected",
"version": "9.12.4.10"
},
{
"status": "affected",
"version": "9.12.4.13"
},
{
"status": "affected",
"version": "9.12.4.8"
},
{
"status": "affected",
"version": "9.12.4.18"
},
{
"status": "affected",
"version": "9.12.4.24"
},
{
"status": "affected",
"version": "9.12.4.26"
},
{
"status": "affected",
"version": "9.12.4.29"
},
{
"status": "affected",
"version": "9.12.4.30"
},
{
"status": "affected",
"version": "9.12.4.35"
},
{
"status": "affected",
"version": "9.12.4.37"
},
{
"status": "affected",
"version": "9.12.4.38"
},
{
"status": "affected",
"version": "9.12.4.39"
},
{
"status": "affected",
"version": "9.12.4.40"
},
{
"status": "affected",
"version": "9.12.4.41"
},
{
"status": "affected",
"version": "9.12.4.47"
},
{
"status": "affected",
"version": "9.12.4.48"
},
{
"status": "affected",
"version": "9.12.4.50"
},
{
"status": "affected",
"version": "9.12.4.52"
},
{
"status": "affected",
"version": "9.12.4.54"
},
{
"status": "affected",
"version": "9.12.4.55"
},
{
"status": "affected",
"version": "9.12.4.56"
},
{
"status": "affected",
"version": "9.12.4.58"
},
{
"status": "affected",
"version": "9.12.4.62"
},
{
"status": "affected",
"version": "9.12.4.65"
},
{
"status": "affected",
"version": "9.12.4.67"
},
{
"status": "affected",
"version": "9.16.1"
},
{
"status": "affected",
"version": "9.16.1.28"
},
{
"status": "affected",
"version": "9.16.2"
},
{
"status": "affected",
"version": "9.16.2.3"
},
{
"status": "affected",
"version": "9.16.2.7"
},
{
"status": "affected",
"version": "9.16.2.11"
},
{
"status": "affected",
"version": "9.16.2.13"
},
{
"status": "affected",
"version": "9.16.2.14"
},
{
"status": "affected",
"version": "9.16.3"
},
{
"status": "affected",
"version": "9.16.3.3"
},
{
"status": "affected",
"version": "9.16.3.14"
},
{
"status": "affected",
"version": "9.16.3.15"
},
{
"status": "affected",
"version": "9.16.3.19"
},
{
"status": "affected",
"version": "9.16.3.23"
},
{
"status": "affected",
"version": "9.16.4"
},
{
"status": "affected",
"version": "9.16.4.9"
},
{
"status": "affected",
"version": "9.16.4.14"
},
{
"status": "affected",
"version": "9.16.4.19"
},
{
"status": "affected",
"version": "9.16.4.27"
},
{
"status": "affected",
"version": "9.16.4.38"
},
{
"status": "affected",
"version": "9.16.4.39"
},
{
"status": "affected",
"version": "9.16.4.42"
},
{
"status": "affected",
"version": "9.16.4.48"
},
{
"status": "affected",
"version": "9.16.4.55"
},
{
"status": "affected",
"version": "9.16.4.57"
},
{
"status": "affected",
"version": "9.16.4.61"
},
{
"status": "affected",
"version": "9.16.4.62"
},
{
"status": "affected",
"version": "9.16.4.67"
},
{
"status": "affected",
"version": "9.16.4.70"
},
{
"status": "affected",
"version": "9.16.4.71"
},
{
"status": "affected",
"version": "9.16.4.76"
},
{
"status": "affected",
"version": "9.16.4.82"
},
{
"status": "affected",
"version": "9.16.4.84"
},
{
"status": "affected",
"version": "9.16.4.85"
},
{
"status": "affected",
"version": "9.17.1"
},
{
"status": "affected",
"version": "9.17.1.7"
},
{
"status": "affected",
"version": "9.17.1.9"
},
{
"status": "affected",
"version": "9.17.1.10"
},
{
"status": "affected",
"version": "9.17.1.11"
},
{
"status": "affected",
"version": "9.17.1.13"
},
{
"status": "affected",
"version": "9.17.1.15"
},
{
"status": "affected",
"version": "9.17.1.20"
},
{
"status": "affected",
"version": "9.17.1.30"
},
{
"status": "affected",
"version": "9.17.1.33"
},
{
"status": "affected",
"version": "9.17.1.39"
},
{
"status": "affected",
"version": "9.17.1.45"
},
{
"status": "affected",
"version": "9.17.1.46"
},
{
"status": "affected",
"version": "9.18.1"
},
{
"status": "affected",
"version": "9.18.1.3"
},
{
"status": "affected",
"version": "9.18.2"
},
{
"status": "affected",
"version": "9.18.2.5"
},
{
"status": "affected",
"version": "9.18.2.7"
},
{
"status": "affected",
"version": "9.18.2.8"
},
{
"status": "affected",
"version": "9.18.3"
},
{
"status": "affected",
"version": "9.18.3.39"
},
{
"status": "affected",
"version": "9.18.3.46"
},
{
"status": "affected",
"version": "9.18.3.53"
},
{
"status": "affected",
"version": "9.18.3.55"
},
{
"status": "affected",
"version": "9.18.3.56"
},
{
"status": "affected",
"version": "9.18.4"
},
{
"status": "affected",
"version": "9.18.4.5"
},
{
"status": "affected",
"version": "9.18.4.8"
},
{
"status": "affected",
"version": "9.18.4.22"
},
{
"status": "affected",
"version": "9.18.4.24"
},
{
"status": "affected",
"version": "9.18.4.29"
},
{
"status": "affected",
"version": "9.18.4.34"
},
{
"status": "affected",
"version": "9.18.4.40"
},
{
"status": "affected",
"version": "9.18.4.47"
},
{
"status": "affected",
"version": "9.18.4.50"
},
{
"status": "affected",
"version": "9.18.4.52"
},
{
"status": "affected",
"version": "9.18.4.53"
},
{
"status": "affected",
"version": "9.18.4.57"
},
{
"status": "affected",
"version": "9.18.4.66"
},
{
"status": "affected",
"version": "9.18.4.67"
},
{
"status": "affected",
"version": "9.18.4.68"
},
{
"status": "affected",
"version": "9.19.1"
},
{
"status": "affected",
"version": "9.19.1.5"
},
{
"status": "affected",
"version": "9.19.1.9"
},
{
"status": "affected",
"version": "9.19.1.12"
},
{
"status": "affected",
"version": "9.19.1.18"
},
{
"status": "affected",
"version": "9.19.1.22"
},
{
"status": "affected",
"version": "9.19.1.24"
},
{
"status": "affected",
"version": "9.19.1.27"
},
{
"status": "affected",
"version": "9.19.1.28"
},
{
"status": "affected",
"version": "9.19.1.31"
},
{
"status": "affected",
"version": "9.19.1.37"
},
{
"status": "affected",
"version": "9.19.1.38"
},
{
"status": "affected",
"version": "9.19.1.42"
},
{
"status": "affected",
"version": "9.20.1"
},
{
"status": "affected",
"version": "9.20.1.5"
},
{
"status": "affected",
"version": "9.20.2"
},
{
"status": "affected",
"version": "9.20.2.10"
},
{
"status": "affected",
"version": "9.20.2.21"
},
{
"status": "affected",
"version": "9.20.2.22"
},
{
"status": "affected",
"version": "9.20.3"
},
{
"status": "affected",
"version": "9.20.3.4"
},
{
"status": "affected",
"version": "9.20.3.7"
},
{
"status": "affected",
"version": "9.20.3.9"
},
{
"status": "affected",
"version": "9.20.3.10"
},
{
"status": "affected",
"version": "9.20.3.13"
},
{
"status": "affected",
"version": "9.20.3.16"
},
{
"status": "affected",
"version": "9.20.3.20"
},
{
"status": "affected",
"version": "9.20.4"
},
{
"status": "affected",
"version": "9.20.4.7"
},
{
"status": "affected",
"version": "9.20.4.10"
},
{
"status": "affected",
"version": "9.20.4.14"
},
{
"status": "affected",
"version": "9.22.1.1"
},
{
"status": "affected",
"version": "9.22.1.3"
},
{
"status": "affected",
"version": "9.22.1.2"
},
{
"status": "affected",
"version": "9.22.1.6"
},
{
"status": "affected",
"version": "9.22.2"
},
{
"status": "affected",
"version": "9.22.2.4"
},
{
"status": "affected",
"version": "9.22.2.9"
},
{
"status": "affected",
"version": "9.22.2.13"
},
{
"status": "affected",
"version": "9.22.2.14"
},
{
"status": "affected",
"version": "9.23.1"
},
{
"status": "affected",
"version": "9.23.1.3"
},
{
"status": "affected",
"version": "9.23.1.7"
},
{
"status": "affected",
"version": "9.23.1.13"
},
{
"status": "affected",
"version": "9.23.1.19"
},
{
"status": "affected",
"version": "9.23.1.22"
}
]
},
{
"product": "Cisco Secure Firewall Threat Defense (FTD) Software",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "6.4.0"
},
{
"status": "affected",
"version": "6.4.0.1"
},
{
"status": "affected",
"version": "6.4.0.3"
},
{
"status": "affected",
"version": "6.4.0.2"
},
{
"status": "affected",
"version": "6.4.0.4"
},
{
"status": "affected",
"version": "6.4.0.5"
},
{
"status": "affected",
"version": "6.4.0.6"
},
{
"status": "affected",
"version": "6.4.0.7"
},
{
"status": "affected",
"version": "6.4.0.8"
},
{
"status": "affected",
"version": "6.4.0.9"
},
{
"status": "affected",
"version": "6.4.0.10"
},
{
"status": "affected",
"version": "6.4.0.11"
},
{
"status": "affected",
"version": "6.4.0.12"
},
{
"status": "affected",
"version": "6.4.0.13"
},
{
"status": "affected",
"version": "6.4.0.14"
},
{
"status": "affected",
"version": "6.4.0.15"
},
{
"status": "affected",
"version": "6.4.0.16"
},
{
"status": "affected",
"version": "6.4.0.17"
},
{
"status": "affected",
"version": "6.4.0.18"
},
{
"status": "affected",
"version": "7.0.0"
},
{
"status": "affected",
"version": "7.0.0.1"
},
{
"status": "affected",
"version": "7.0.1"
},
{
"status": "affected",
"version": "7.0.1.1"
},
{
"status": "affected",
"version": "7.0.2"
},
{
"status": "affected",
"version": "7.0.2.1"
},
{
"status": "affected",
"version": "7.0.3"
},
{
"status": "affected",
"version": "7.0.4"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "7.0.6"
},
{
"status": "affected",
"version": "7.0.6.1"
},
{
"status": "affected",
"version": "7.0.6.2"
},
{
"status": "affected",
"version": "7.0.6.3"
},
{
"status": "affected",
"version": "7.0.7"
},
{
"status": "affected",
"version": "7.0.8"
},
{
"status": "affected",
"version": "7.0.8.1"
},
{
"status": "affected",
"version": "7.1.0"
},
{
"status": "affected",
"version": "7.1.0.1"
},
{
"status": "affected",
"version": "7.1.0.2"
},
{
"status": "affected",
"version": "7.1.0.3"
},
{
"status": "affected",
"version": "7.2.0"
},
{
"status": "affected",
"version": "7.2.0.1"
},
{
"status": "affected",
"version": "7.2.1"
},
{
"status": "affected",
"version": "7.2.2"
},
{
"status": "affected",
"version": "7.2.3"
},
{
"status": "affected",
"version": "7.2.4"
},
{
"status": "affected",
"version": "7.2.4.1"
},
{
"status": "affected",
"version": "7.2.5"
},
{
"status": "affected",
"version": "7.2.5.1"
},
{
"status": "affected",
"version": "7.2.6"
},
{
"status": "affected",
"version": "7.2.7"
},
{
"status": "affected",
"version": "7.2.5.2"
},
{
"status": "affected",
"version": "7.2.8"
},
{
"status": "affected",
"version": "7.2.8.1"
},
{
"status": "affected",
"version": "7.2.9"
},
{
"status": "affected",
"version": "7.2.10"
},
{
"status": "affected",
"version": "7.2.10.2"
},
{
"status": "affected",
"version": "7.3.0"
},
{
"status": "affected",
"version": "7.3.1"
},
{
"status": "affected",
"version": "7.3.1.1"
},
{
"status": "affected",
"version": "7.3.1.2"
},
{
"status": "affected",
"version": "7.4.0"
},
{
"status": "affected",
"version": "7.4.1"
},
{
"status": "affected",
"version": "7.4.1.1"
},
{
"status": "affected",
"version": "7.4.2"
},
{
"status": "affected",
"version": "7.4.2.1"
},
{
"status": "affected",
"version": "7.4.2.2"
},
{
"status": "affected",
"version": "7.4.2.3"
},
{
"status": "affected",
"version": "7.4.2.4"
},
{
"status": "affected",
"version": "7.4.3"
},
{
"status": "affected",
"version": "7.6.0"
},
{
"status": "affected",
"version": "7.6.1"
},
{
"status": "affected",
"version": "7.6.2"
},
{
"status": "affected",
"version": "7.6.2.1"
},
{
"status": "affected",
"version": "7.7.0"
},
{
"status": "affected",
"version": "7.7.10"
},
{
"status": "affected",
"version": "7.7.10.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\r\n\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "LOW",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-401",
"description": "Missing Release of Memory after Effective Lifetime",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-04T18:35:06.717Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW"
}
],
"source": {
"advisory": "cisco-sa-asaftd-ospf-ZH8PhbSW",
"defects": [
"CSCwn69079"
],
"discovery": "INTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-20021",
"datePublished": "2026-03-04T18:35:06.717Z",
"dateReserved": "2025-10-08T11:59:15.352Z",
"dateUpdated": "2026-03-04T21:30:11.471Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-20021\",\"sourceIdentifier\":\"psirt@cisco.com\",\"published\":\"2026-03-04T19:16:12.150\",\"lastModified\":\"2026-03-05T19:39:11.967\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\\r\\n\\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\",\"baseScore\":4.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"references\":[{\"url\":\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW\",\"source\":\"psirt@cisco.com\"}]}}",
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-20021\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-04T21:29:56.096429Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-04T21:30:06.900Z\"}}], \"cna\": {\"source\": {\"defects\": [\"CSCwn69079\"], \"advisory\": \"cisco-sa-asaftd-ospf-ZH8PhbSW\", \"discovery\": \"INTERNAL\"}, \"metrics\": [{\"format\": \"cvssV3_1\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.3, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"LOW\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Firewall Adaptive Security Appliance (ASA) Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.12.1\"}, {\"status\": \"affected\", \"version\": \"9.12.1.2\"}, {\"status\": \"affected\", \"version\": \"9.12.1.3\"}, {\"status\": \"affected\", \"version\": \"9.12.2\"}, {\"status\": \"affected\", \"version\": \"9.12.2.4\"}, {\"status\": \"affected\", \"version\": \"9.12.2.5\"}, {\"status\": \"affected\", \"version\": \"9.12.2.9\"}, {\"status\": \"affected\", \"version\": \"9.12.3\"}, {\"status\": \"affected\", \"version\": \"9.12.3.2\"}, {\"status\": \"affected\", \"version\": \"9.12.3.7\"}, {\"status\": \"affected\", \"version\": \"9.12.4\"}, {\"status\": \"affected\", \"version\": \"9.12.3.12\"}, {\"status\": \"affected\", \"version\": \"9.12.3.9\"}, {\"status\": \"affected\", \"version\": \"9.12.2.1\"}, {\"status\": \"affected\", \"version\": \"9.12.4.2\"}, {\"status\": \"affected\", \"version\": \"9.12.4.4\"}, {\"status\": \"affected\", \"version\": \"9.12.4.7\"}, {\"status\": \"affected\", \"version\": \"9.12.4.10\"}, {\"status\": \"affected\", \"version\": \"9.12.4.13\"}, {\"status\": \"affected\", \"version\": \"9.12.4.8\"}, {\"status\": \"affected\", \"version\": \"9.12.4.18\"}, {\"status\": \"affected\", \"version\": \"9.12.4.24\"}, {\"status\": \"affected\", \"version\": \"9.12.4.26\"}, {\"status\": \"affected\", \"version\": \"9.12.4.29\"}, {\"status\": \"affected\", \"version\": \"9.12.4.30\"}, {\"status\": \"affected\", \"version\": \"9.12.4.35\"}, {\"status\": \"affected\", \"version\": \"9.12.4.37\"}, {\"status\": \"affected\", \"version\": \"9.12.4.38\"}, {\"status\": \"affected\", \"version\": \"9.12.4.39\"}, {\"status\": \"affected\", \"version\": \"9.12.4.40\"}, {\"status\": \"affected\", \"version\": \"9.12.4.41\"}, {\"status\": \"affected\", \"version\": \"9.12.4.47\"}, {\"status\": \"affected\", \"version\": \"9.12.4.48\"}, {\"status\": \"affected\", \"version\": \"9.12.4.50\"}, {\"status\": \"affected\", \"version\": \"9.12.4.52\"}, {\"status\": \"affected\", \"version\": \"9.12.4.54\"}, {\"status\": \"affected\", \"version\": \"9.12.4.55\"}, {\"status\": \"affected\", \"version\": \"9.12.4.56\"}, {\"status\": \"affected\", \"version\": \"9.12.4.58\"}, {\"status\": \"affected\", \"version\": \"9.12.4.62\"}, {\"status\": \"affected\", \"version\": \"9.12.4.65\"}, {\"status\": \"affected\", \"version\": \"9.12.4.67\"}, {\"status\": \"affected\", \"version\": \"9.16.1\"}, {\"status\": \"affected\", \"version\": \"9.16.1.28\"}, {\"status\": \"affected\", \"version\": \"9.16.2\"}, {\"status\": \"affected\", \"version\": \"9.16.2.3\"}, {\"status\": \"affected\", \"version\": \"9.16.2.7\"}, {\"status\": \"affected\", \"version\": \"9.16.2.11\"}, {\"status\": \"affected\", \"version\": \"9.16.2.13\"}, {\"status\": \"affected\", \"version\": \"9.16.2.14\"}, {\"status\": \"affected\", \"version\": \"9.16.3\"}, {\"status\": \"affected\", \"version\": \"9.16.3.3\"}, {\"status\": \"affected\", \"version\": \"9.16.3.14\"}, {\"status\": \"affected\", \"version\": \"9.16.3.15\"}, {\"status\": \"affected\", \"version\": \"9.16.3.19\"}, {\"status\": \"affected\", \"version\": \"9.16.3.23\"}, {\"status\": \"affected\", \"version\": \"9.16.4\"}, {\"status\": \"affected\", \"version\": \"9.16.4.9\"}, {\"status\": \"affected\", \"version\": \"9.16.4.14\"}, {\"status\": \"affected\", \"version\": \"9.16.4.19\"}, {\"status\": \"affected\", \"version\": \"9.16.4.27\"}, {\"status\": \"affected\", \"version\": \"9.16.4.38\"}, {\"status\": \"affected\", \"version\": \"9.16.4.39\"}, {\"status\": \"affected\", \"version\": \"9.16.4.42\"}, {\"status\": \"affected\", \"version\": \"9.16.4.48\"}, {\"status\": \"affected\", \"version\": \"9.16.4.55\"}, {\"status\": \"affected\", \"version\": \"9.16.4.57\"}, {\"status\": \"affected\", \"version\": \"9.16.4.61\"}, {\"status\": \"affected\", \"version\": \"9.16.4.62\"}, {\"status\": \"affected\", \"version\": \"9.16.4.67\"}, {\"status\": \"affected\", \"version\": \"9.16.4.70\"}, {\"status\": \"affected\", \"version\": \"9.16.4.71\"}, {\"status\": \"affected\", \"version\": \"9.16.4.76\"}, {\"status\": \"affected\", \"version\": \"9.16.4.82\"}, {\"status\": \"affected\", \"version\": \"9.16.4.84\"}, {\"status\": \"affected\", \"version\": \"9.16.4.85\"}, {\"status\": \"affected\", \"version\": \"9.17.1\"}, {\"status\": \"affected\", \"version\": \"9.17.1.7\"}, {\"status\": \"affected\", \"version\": \"9.17.1.9\"}, {\"status\": \"affected\", \"version\": \"9.17.1.10\"}, {\"status\": \"affected\", \"version\": \"9.17.1.11\"}, {\"status\": \"affected\", \"version\": \"9.17.1.13\"}, {\"status\": \"affected\", \"version\": \"9.17.1.15\"}, {\"status\": \"affected\", \"version\": \"9.17.1.20\"}, {\"status\": \"affected\", \"version\": \"9.17.1.30\"}, {\"status\": \"affected\", \"version\": \"9.17.1.33\"}, {\"status\": \"affected\", \"version\": \"9.17.1.39\"}, {\"status\": \"affected\", \"version\": \"9.17.1.45\"}, {\"status\": \"affected\", \"version\": \"9.17.1.46\"}, {\"status\": \"affected\", \"version\": \"9.18.1\"}, {\"status\": \"affected\", \"version\": \"9.18.1.3\"}, {\"status\": \"affected\", \"version\": \"9.18.2\"}, {\"status\": \"affected\", \"version\": \"9.18.2.5\"}, {\"status\": \"affected\", \"version\": \"9.18.2.7\"}, {\"status\": \"affected\", \"version\": \"9.18.2.8\"}, {\"status\": \"affected\", \"version\": \"9.18.3\"}, {\"status\": \"affected\", \"version\": \"9.18.3.39\"}, {\"status\": \"affected\", \"version\": \"9.18.3.46\"}, {\"status\": \"affected\", \"version\": \"9.18.3.53\"}, {\"status\": \"affected\", \"version\": \"9.18.3.55\"}, {\"status\": \"affected\", \"version\": \"9.18.3.56\"}, {\"status\": \"affected\", \"version\": \"9.18.4\"}, {\"status\": \"affected\", \"version\": \"9.18.4.5\"}, {\"status\": \"affected\", \"version\": \"9.18.4.8\"}, {\"status\": \"affected\", \"version\": \"9.18.4.22\"}, {\"status\": \"affected\", \"version\": \"9.18.4.24\"}, {\"status\": \"affected\", \"version\": \"9.18.4.29\"}, {\"status\": \"affected\", \"version\": \"9.18.4.34\"}, {\"status\": \"affected\", \"version\": \"9.18.4.40\"}, {\"status\": \"affected\", \"version\": \"9.18.4.47\"}, {\"status\": \"affected\", \"version\": \"9.18.4.50\"}, {\"status\": \"affected\", \"version\": \"9.18.4.52\"}, {\"status\": \"affected\", \"version\": \"9.18.4.53\"}, {\"status\": \"affected\", \"version\": \"9.18.4.57\"}, {\"status\": \"affected\", \"version\": \"9.18.4.66\"}, {\"status\": \"affected\", \"version\": \"9.18.4.67\"}, {\"status\": \"affected\", \"version\": \"9.18.4.68\"}, {\"status\": \"affected\", \"version\": \"9.19.1\"}, {\"status\": \"affected\", \"version\": \"9.19.1.5\"}, {\"status\": \"affected\", \"version\": \"9.19.1.9\"}, {\"status\": \"affected\", \"version\": \"9.19.1.12\"}, {\"status\": \"affected\", \"version\": \"9.19.1.18\"}, {\"status\": \"affected\", \"version\": \"9.19.1.22\"}, {\"status\": \"affected\", \"version\": \"9.19.1.24\"}, {\"status\": \"affected\", \"version\": \"9.19.1.27\"}, {\"status\": \"affected\", \"version\": \"9.19.1.28\"}, {\"status\": \"affected\", \"version\": \"9.19.1.31\"}, {\"status\": \"affected\", \"version\": \"9.19.1.37\"}, {\"status\": \"affected\", \"version\": \"9.19.1.38\"}, {\"status\": \"affected\", \"version\": \"9.19.1.42\"}, {\"status\": \"affected\", \"version\": \"9.20.1\"}, {\"status\": \"affected\", \"version\": \"9.20.1.5\"}, {\"status\": \"affected\", \"version\": \"9.20.2\"}, {\"status\": \"affected\", \"version\": \"9.20.2.10\"}, {\"status\": \"affected\", \"version\": \"9.20.2.21\"}, {\"status\": \"affected\", \"version\": \"9.20.2.22\"}, {\"status\": \"affected\", \"version\": \"9.20.3\"}, {\"status\": \"affected\", \"version\": \"9.20.3.4\"}, {\"status\": \"affected\", \"version\": \"9.20.3.7\"}, {\"status\": \"affected\", \"version\": \"9.20.3.9\"}, {\"status\": \"affected\", \"version\": \"9.20.3.10\"}, {\"status\": \"affected\", \"version\": \"9.20.3.13\"}, {\"status\": \"affected\", \"version\": \"9.20.3.16\"}, {\"status\": \"affected\", \"version\": \"9.20.3.20\"}, {\"status\": \"affected\", \"version\": \"9.20.4\"}, {\"status\": \"affected\", \"version\": \"9.20.4.7\"}, {\"status\": \"affected\", \"version\": \"9.20.4.10\"}, {\"status\": \"affected\", \"version\": \"9.20.4.14\"}, {\"status\": \"affected\", \"version\": \"9.22.1.1\"}, {\"status\": \"affected\", \"version\": \"9.22.1.3\"}, {\"status\": \"affected\", \"version\": \"9.22.1.2\"}, {\"status\": \"affected\", \"version\": \"9.22.1.6\"}, {\"status\": \"affected\", \"version\": \"9.22.2\"}, {\"status\": \"affected\", \"version\": \"9.22.2.4\"}, {\"status\": \"affected\", \"version\": \"9.22.2.9\"}, {\"status\": \"affected\", \"version\": \"9.22.2.13\"}, {\"status\": \"affected\", \"version\": \"9.22.2.14\"}, {\"status\": \"affected\", \"version\": \"9.23.1\"}, {\"status\": \"affected\", \"version\": \"9.23.1.3\"}, {\"status\": \"affected\", \"version\": \"9.23.1.7\"}, {\"status\": \"affected\", \"version\": \"9.23.1.13\"}, {\"status\": \"affected\", \"version\": \"9.23.1.19\"}, {\"status\": \"affected\", \"version\": \"9.23.1.22\"}]}, {\"vendor\": \"Cisco\", \"product\": \"Cisco Secure Firewall Threat Defense (FTD) Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.4.0\"}, {\"status\": \"affected\", \"version\": \"6.4.0.1\"}, {\"status\": \"affected\", \"version\": \"6.4.0.3\"}, {\"status\": \"affected\", \"version\": \"6.4.0.2\"}, {\"status\": \"affected\", \"version\": \"6.4.0.4\"}, {\"status\": \"affected\", \"version\": \"6.4.0.5\"}, {\"status\": \"affected\", \"version\": \"6.4.0.6\"}, {\"status\": \"affected\", \"version\": \"6.4.0.7\"}, {\"status\": \"affected\", \"version\": \"6.4.0.8\"}, {\"status\": \"affected\", \"version\": \"6.4.0.9\"}, {\"status\": \"affected\", \"version\": \"6.4.0.10\"}, {\"status\": \"affected\", \"version\": \"6.4.0.11\"}, {\"status\": \"affected\", \"version\": \"6.4.0.12\"}, {\"status\": \"affected\", \"version\": \"6.4.0.13\"}, {\"status\": \"affected\", \"version\": \"6.4.0.14\"}, {\"status\": \"affected\", \"version\": \"6.4.0.15\"}, {\"status\": \"affected\", \"version\": \"6.4.0.16\"}, {\"status\": \"affected\", \"version\": \"6.4.0.17\"}, {\"status\": \"affected\", \"version\": \"6.4.0.18\"}, {\"status\": \"affected\", \"version\": \"7.0.0\"}, {\"status\": \"affected\", \"version\": \"7.0.0.1\"}, {\"status\": \"affected\", \"version\": \"7.0.1\"}, {\"status\": \"affected\", \"version\": \"7.0.1.1\"}, {\"status\": \"affected\", \"version\": \"7.0.2\"}, {\"status\": \"affected\", \"version\": \"7.0.2.1\"}, {\"status\": \"affected\", \"version\": \"7.0.3\"}, {\"status\": \"affected\", \"version\": \"7.0.4\"}, {\"status\": \"affected\", \"version\": \"7.0.5\"}, {\"status\": \"affected\", \"version\": \"7.0.6\"}, {\"status\": \"affected\", \"version\": \"7.0.6.1\"}, {\"status\": \"affected\", \"version\": \"7.0.6.2\"}, {\"status\": \"affected\", \"version\": \"7.0.6.3\"}, {\"status\": \"affected\", \"version\": \"7.0.7\"}, {\"status\": \"affected\", \"version\": \"7.0.8\"}, {\"status\": \"affected\", \"version\": \"7.0.8.1\"}, {\"status\": \"affected\", \"version\": \"7.1.0\"}, {\"status\": \"affected\", \"version\": \"7.1.0.1\"}, {\"status\": \"affected\", \"version\": \"7.1.0.2\"}, {\"status\": \"affected\", \"version\": \"7.1.0.3\"}, {\"status\": \"affected\", \"version\": \"7.2.0\"}, {\"status\": \"affected\", \"version\": \"7.2.0.1\"}, {\"status\": \"affected\", \"version\": \"7.2.1\"}, {\"status\": \"affected\", \"version\": \"7.2.2\"}, {\"status\": \"affected\", \"version\": \"7.2.3\"}, {\"status\": \"affected\", \"version\": \"7.2.4\"}, {\"status\": \"affected\", \"version\": \"7.2.4.1\"}, {\"status\": \"affected\", \"version\": \"7.2.5\"}, {\"status\": \"affected\", \"version\": \"7.2.5.1\"}, {\"status\": \"affected\", \"version\": \"7.2.6\"}, {\"status\": \"affected\", \"version\": \"7.2.7\"}, {\"status\": \"affected\", \"version\": \"7.2.5.2\"}, {\"status\": \"affected\", \"version\": \"7.2.8\"}, {\"status\": \"affected\", \"version\": \"7.2.8.1\"}, {\"status\": \"affected\", \"version\": \"7.2.9\"}, {\"status\": \"affected\", \"version\": \"7.2.10\"}, {\"status\": \"affected\", \"version\": \"7.2.10.2\"}, {\"status\": \"affected\", \"version\": \"7.3.0\"}, {\"status\": \"affected\", \"version\": \"7.3.1\"}, {\"status\": \"affected\", \"version\": \"7.3.1.1\"}, {\"status\": \"affected\", \"version\": \"7.3.1.2\"}, {\"status\": \"affected\", \"version\": \"7.4.0\"}, {\"status\": \"affected\", \"version\": \"7.4.1\"}, {\"status\": \"affected\", \"version\": \"7.4.1.1\"}, {\"status\": \"affected\", \"version\": \"7.4.2\"}, {\"status\": \"affected\", \"version\": \"7.4.2.1\"}, {\"status\": \"affected\", \"version\": \"7.4.2.2\"}, {\"status\": \"affected\", \"version\": \"7.4.2.3\"}, {\"status\": \"affected\", \"version\": \"7.4.2.4\"}, {\"status\": \"affected\", \"version\": \"7.4.3\"}, {\"status\": \"affected\", \"version\": \"7.6.0\"}, {\"status\": \"affected\", \"version\": \"7.6.1\"}, {\"status\": \"affected\", \"version\": \"7.6.2\"}, {\"status\": \"affected\", \"version\": \"7.6.2.1\"}, {\"status\": \"affected\", \"version\": \"7.7.0\"}, {\"status\": \"affected\", \"version\": \"7.7.10\"}, {\"status\": \"affected\", \"version\": \"7.7.10.1\"}]}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW\", \"name\": \"cisco-sa-asaftd-ospf-ZH8PhbSW\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the OSPF protocol of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an authenticated, adjacent attacker to exhaust memory on an affected device, resulting in a denial of service (DoS) condition.\\r\\n\\r This vulnerability is due to improperly validating input by the OSPF protocol when parsing packets. An attacker could exploit this vulnerability by by sending crafted OSPF packets to an affected device. A successful exploit could allow the attacker to exhaust memory on the affected device, resulting in a DoS condition.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-401\", \"description\": \"Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2026-03-04T18:35:06.717Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-20021\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-04T21:30:11.471Z\", \"dateReserved\": \"2025-10-08T11:59:15.352Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2026-03-04T18:35:06.717Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…