CVE-2025-20241 (GCVE-0-2025-20241)
Vulnerability from cvelistv5
Published
2025-08-27 16:23
Modified
2025-08-27 18:18
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-733 - Compiler Optimization Removal or Modification of Security-critical Code
Summary
A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload.
This vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition.
Note: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco NX-OS Software |
Version: 9.2(3) Version: 7.0(3)I5(2) Version: 6.0(2)A8(7a) Version: 7.0(3)I4(5) Version: 7.0(3)I4(6) Version: 7.0(3)I4(3) Version: 9.2(2v) Version: 7.0(3)I4(7) Version: 7.0(3)I4(1) Version: 7.0(3)I4(8) Version: 7.0(3)I4(2) Version: 6.0(2)A8(11) Version: 9.2(1) Version: 9.2(2t) Version: 9.2(3y) Version: 7.0(3)I4(1t) Version: 7.0(3)I7(6z) Version: 9.3(2) Version: 7.0(3)F3(3) Version: 7.0(3)I7(3z) Version: 7.0(3)IM7(2) Version: 6.0(2)A8(11b) Version: 7.0(3)I7(5a) Version: 7.0(3)I6(1) Version: 7.0(3)I5(3b) Version: 9.2(4) Version: 6.0(2)A8(10) Version: 6.0(2)A8(2) Version: 7.0(3)IC4(4) Version: 7.0(3)F3(3c) Version: 7.0(3)F3(1) Version: 7.0(3)F3(5) Version: 7.0(3)I7(2) Version: 7.0(3)I5(3) Version: 7.0(3)I7(3) Version: 6.0(2)A8(6) Version: 7.0(3)I6(2) Version: 6.0(2)A8(5) Version: 9.3(1) Version: 6.0(2)A8(7) Version: 7.0(3)I7(6) Version: 6.0(2)A8(11a) Version: 7.0(3)I4(8z) Version: 7.0(3)I4(9) Version: 7.0(3)I7(4) Version: 7.0(3)I7(7) Version: 6.0(2)A8(9) Version: 6.0(2)A8(1) Version: 6.0(2)A8(10a) Version: 7.0(3)I5(1) Version: 9.3(1z) Version: 9.2(2) Version: 7.0(3)F3(4) Version: 7.0(3)I4(8b) Version: 6.0(2)A8(3) Version: 7.0(3)I4(6t) Version: 7.0(3)I5(3a) Version: 6.0(2)A8(8) Version: 7.0(3)I7(5) Version: 7.0(3)F3(3a) Version: 6.0(2)A8(4) Version: 7.0(3)I4(8a) Version: 7.0(3)F3(2) Version: 7.0(3)I4(4) Version: 7.0(3)I7(1) Version: 7.0(3)IA7(2) Version: 7.0(3)IA7(1) Version: 6.0(2)A8(7b) Version: 6.0(2)A8(4a) Version: 9.3(3) Version: 7.0(3)I7(8) Version: 9.3(4) Version: 9.3(5) Version: 7.0(3)I7(9) Version: 9.3(6) Version: 10.1(2) Version: 10.1(1) Version: 9.3(5w) Version: 9.3(7) Version: 9.3(7k) Version: 7.0(3)I7(9w) Version: 10.2(1) Version: 9.3(7a) Version: 9.3(8) Version: 7.0(3)I7(10) Version: 10.2(1q) Version: 10.2(2) Version: 9.3(9) Version: 10.1(2t) Version: 10.2(3) Version: 10.2(3t) Version: 9.3(10) Version: 10.2(2a) Version: 10.3(1) Version: 10.2(4) Version: 10.3(2) Version: 9.3(11) Version: 10.3(3) Version: 10.2(5) Version: 9.3(12) Version: 10.2(3v) Version: 10.4(1) Version: 10.3(99w) Version: 10.2(6) Version: 10.3(3w) Version: 10.3(99x) Version: 10.3(3o) Version: 10.3(4) Version: 10.3(3p) Version: 10.3(4a) Version: 10.4(2) Version: 10.3(3q) Version: 9.3(13) Version: 10.3(5) Version: 10.2(7) Version: 10.4(3) Version: 10.3(3x) Version: 10.3(4g) Version: 10.5(1) Version: 10.2(8) Version: 10.3(3r) Version: 10.3(6) Version: 9.3(14) Version: 10.4(4) Version: 10.3(4h) Version: 10.5(2) Version: 10.4(4g) |
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"vulnrichment": {
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\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"Cisco\", \"product\": \"Cisco NX-OS Software\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.2(3)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I5(2)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(7a)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(5)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(6)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(3)\"}, {\"status\": \"affected\", \"version\": \"9.2(2v)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(7)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(1)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(8)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(2)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(11)\"}, {\"status\": \"affected\", \"version\": \"9.2(1)\"}, {\"status\": \"affected\", \"version\": \"9.2(2t)\"}, {\"status\": \"affected\", \"version\": \"9.2(3y)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(1t)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(6z)\"}, {\"status\": \"affected\", \"version\": \"9.3(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(3)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(3z)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)IM7(2)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(11b)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(5a)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I6(1)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I5(3b)\"}, {\"status\": \"affected\", \"version\": \"9.2(4)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(10)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)IC4(4)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(3c)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(1)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(5)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I5(3)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(3)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(6)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I6(2)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(5)\"}, {\"status\": \"affected\", \"version\": \"9.3(1)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(7)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(6)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(11a)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(8z)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(9)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(4)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(7)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(9)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(1)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(10a)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I5(1)\"}, {\"status\": \"affected\", \"version\": \"9.3(1z)\"}, {\"status\": \"affected\", \"version\": \"9.2(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(4)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(8b)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(3)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(6t)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I5(3a)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(8)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(5)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(3a)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(4)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(8a)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)F3(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I4(4)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(1)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)IA7(2)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)IA7(1)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(7b)\"}, {\"status\": \"affected\", \"version\": \"6.0(2)A8(4a)\"}, {\"status\": \"affected\", \"version\": \"9.3(3)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(8)\"}, {\"status\": \"affected\", \"version\": \"9.3(4)\"}, {\"status\": \"affected\", \"version\": \"9.3(5)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(9)\"}, {\"status\": \"affected\", \"version\": \"9.3(6)\"}, {\"status\": \"affected\", \"version\": \"10.1(2)\"}, {\"status\": \"affected\", \"version\": \"10.1(1)\"}, {\"status\": \"affected\", \"version\": \"9.3(5w)\"}, {\"status\": \"affected\", \"version\": \"9.3(7)\"}, {\"status\": \"affected\", \"version\": \"9.3(7k)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(9w)\"}, {\"status\": \"affected\", \"version\": \"10.2(1)\"}, {\"status\": \"affected\", \"version\": \"9.3(7a)\"}, {\"status\": \"affected\", \"version\": \"9.3(8)\"}, {\"status\": \"affected\", \"version\": \"7.0(3)I7(10)\"}, {\"status\": \"affected\", \"version\": \"10.2(1q)\"}, {\"status\": \"affected\", \"version\": \"10.2(2)\"}, {\"status\": \"affected\", \"version\": \"9.3(9)\"}, {\"status\": \"affected\", \"version\": \"10.1(2t)\"}, {\"status\": \"affected\", \"version\": \"10.2(3)\"}, {\"status\": \"affected\", \"version\": \"10.2(3t)\"}, {\"status\": \"affected\", \"version\": \"9.3(10)\"}, {\"status\": \"affected\", \"version\": \"10.2(2a)\"}, {\"status\": \"affected\", \"version\": \"10.3(1)\"}, {\"status\": \"affected\", \"version\": \"10.2(4)\"}, {\"status\": \"affected\", \"version\": \"10.3(2)\"}, {\"status\": \"affected\", \"version\": \"9.3(11)\"}, {\"status\": \"affected\", \"version\": \"10.3(3)\"}, {\"status\": \"affected\", \"version\": \"10.2(5)\"}, {\"status\": \"affected\", \"version\": \"9.3(12)\"}, {\"status\": \"affected\", \"version\": \"10.2(3v)\"}, {\"status\": \"affected\", \"version\": \"10.4(1)\"}, {\"status\": \"affected\", \"version\": \"10.3(99w)\"}, {\"status\": \"affected\", \"version\": \"10.2(6)\"}, {\"status\": \"affected\", \"version\": \"10.3(3w)\"}, {\"status\": \"affected\", \"version\": \"10.3(99x)\"}, {\"status\": \"affected\", \"version\": \"10.3(3o)\"}, {\"status\": \"affected\", \"version\": \"10.3(4)\"}, {\"status\": \"affected\", \"version\": \"10.3(3p)\"}, {\"status\": \"affected\", \"version\": \"10.3(4a)\"}, {\"status\": \"affected\", \"version\": \"10.4(2)\"}, {\"status\": \"affected\", \"version\": \"10.3(3q)\"}, {\"status\": \"affected\", \"version\": \"9.3(13)\"}, {\"status\": \"affected\", \"version\": \"10.3(5)\"}, {\"status\": \"affected\", \"version\": \"10.2(7)\"}, {\"status\": \"affected\", \"version\": \"10.4(3)\"}, {\"status\": \"affected\", \"version\": \"10.3(3x)\"}, {\"status\": \"affected\", \"version\": \"10.3(4g)\"}, {\"status\": \"affected\", \"version\": \"10.5(1)\"}, {\"status\": \"affected\", \"version\": \"10.2(8)\"}, {\"status\": \"affected\", \"version\": \"10.3(3r)\"}, {\"status\": \"affected\", \"version\": \"10.3(6)\"}, {\"status\": \"affected\", \"version\": \"9.3(14)\"}, {\"status\": \"affected\", \"version\": \"10.4(4)\"}, {\"status\": \"affected\", \"version\": \"10.3(4h)\"}, {\"status\": \"affected\", \"version\": \"10.5(2)\"}, {\"status\": \"affected\", \"version\": \"10.4(4g)\"}], \"defaultStatus\": \"unknown\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.\"}], \"references\": [{\"url\": \"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n39k-isis-dos-JhJA8Rfx\", \"name\": \"cisco-sa-n39k-isis-dos-JhJA8Rfx\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability in the Intermediate System-to-Intermediate System (IS-IS) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the IS-IS process to unexpectedly restart, which could cause an affected device to reload.\\r\\n\\r\\nThis vulnerability is due to insufficient input validation when parsing an ingress IS-IS packet. An attacker could exploit this vulnerability by sending a crafted IS-IS packet to an affected device. A successful exploit could allow the attacker to cause the unexpected restart of the IS-IS process, which could cause the affected device to reload, resulting in a denial of service (DoS) condition.\\r\\nNote: The IS-IS protocol is a routing protocol. To exploit this vulnerability, an attacker must be Layer 2-adjacent to the affected device.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"cwe\", \"cweId\": \"CWE-733\", \"description\": \"Compiler Optimization Removal or Modification of Security-critical Code\"}]}], \"providerMetadata\": {\"orgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"shortName\": \"cisco\", \"dateUpdated\": \"2025-08-27T16:23:55.242Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-20241\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-08-27T18:18:32.250Z\", \"dateReserved\": \"2024-10-10T19:15:13.238Z\", \"assignerOrgId\": \"d1c1063e-7a18-46af-9102-31f8928bc633\", \"datePublished\": \"2025-08-27T16:23:55.242Z\", \"assignerShortName\": \"cisco\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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