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CNVD-2026-12682
Vulnerability from cnvd - Published: 2026-03-05
VLAI Severity ?
Title
Cisco IOS XE Software代码问题漏洞
Description
Cisco IOS XE Software是美国思科（Cisco）公司的一种网络操作系统。
Cisco IOS XE Software存在安全漏洞，攻击者可利用该漏洞导致拒绝服务攻击。
Severity
中
Patch Name
Cisco IOS XE Software代码问题漏洞的补丁
Patch Description
Cisco IOS XE Software是美国思科（Cisco）公司的一种网络操作系统。
Cisco IOS XE Software存在安全漏洞，攻击者可利用该漏洞导致拒绝服务攻击。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。
Formal description
厂商已发布了漏洞修复程序，请及时关注更新： https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-PtmD7bgy
Reference
https://nvd.nist.gov/vuln/detail/CVE-2025-20311
Impacted products
| Name | Cisco IOS XE |
|---|
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CVE-2025-20311 (GCVE-0-2025-20311)
Vulnerability from cvelistv5 – Published: 2025-09-24 17:12 – Updated: 2025-09-30 14:28
VLAI?
EPSS
Summary
A vulnerability in the handling of certain Ethernet frames in Cisco IOS XE Software for Catalyst 9000 Series Switches could allow an unauthenticated, adjacent attacker to cause an egress port to become blocked and drop all outbound traffic.
This vulnerability is due to improper handling of crafted Ethernet frames. An attacker could exploit this vulnerability by sending crafted Ethernet frames through an affected switch. A successful exploit could allow the attacker to cause the egress port to which the crafted frame is forwarded to start dropping all frames, resulting in a denial of service (DoS) condition.
Severity ?
7.4 (High)
CWE
- CWE-19 - Data Handling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Cisco | Cisco IOS XE Software |
Affected:
16.6.1
Affected: 16.6.2 Affected: 16.6.3 Affected: 16.6.4 Affected: 16.6.5 Affected: 16.6.4a Affected: 16.6.6 Affected: 16.6.7 Affected: 16.6.8 Affected: 16.6.9 Affected: 16.6.10 Affected: 16.7.1 Affected: 16.8.1 Affected: 16.8.1a Affected: 16.8.1s Affected: 16.9.1 Affected: 16.9.2 Affected: 16.9.1s Affected: 16.9.3 Affected: 16.9.4 Affected: 16.9.5 Affected: 16.9.6 Affected: 16.9.7 Affected: 16.9.8 Affected: 16.10.1 Affected: 16.10.1s Affected: 16.10.1e Affected: 16.11.1 Affected: 16.11.1b Affected: 16.11.1s Affected: 16.12.1 Affected: 16.12.1s Affected: 16.12.1c Affected: 16.12.2 Affected: 16.12.3 Affected: 16.12.8 Affected: 16.12.2s Affected: 16.12.4 Affected: 16.12.3s Affected: 16.12.3a Affected: 16.12.4a Affected: 16.12.5 Affected: 16.12.6 Affected: 16.12.5b Affected: 16.12.6a Affected: 16.12.7 Affected: 16.12.14 Affected: 17.1.1 Affected: 17.1.1s Affected: 17.1.1t Affected: 17.1.3 Affected: 17.2.1 Affected: 17.2.1a Affected: 17.3.1 Affected: 17.3.2 Affected: 17.3.3 Affected: 17.3.2a Affected: 17.3.4 Affected: 17.3.5 Affected: 17.3.6 Affected: 17.3.4b Affected: 17.3.7 Affected: 17.3.8 Affected: 17.3.8a Affected: 17.4.1 Affected: 17.5.1 Affected: 17.6.1 Affected: 17.6.2 Affected: 17.6.3 Affected: 17.6.1y Affected: 17.6.4 Affected: 17.6.5 Affected: 17.6.6 Affected: 17.6.6a Affected: 17.6.5a Affected: 17.6.7 Affected: 17.6.8 Affected: 17.7.1 Affected: 17.10.1 Affected: 17.10.1b Affected: 17.8.1 Affected: 17.9.1 Affected: 17.9.2 Affected: 17.9.3 Affected: 17.9.4 Affected: 17.9.5 Affected: 17.9.4a Affected: 17.9.6 Affected: 17.9.6a Affected: 17.11.1 Affected: 17.12.1 Affected: 17.12.2 Affected: 17.12.3 Affected: 17.12.4 Affected: 17.12.1z3 Affected: 17.13.1 Affected: 17.14.1 Affected: 17.11.99SW Affected: 17.15.1 Affected: 17.15.2 Affected: 17.15.2a Affected: 17.15.2b Affected: 17.16.1 |
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"versions": [
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"status": "affected",
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{
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},
{
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},
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},
{
"status": "affected",
"version": "16.12.14"
},
{
"status": "affected",
"version": "17.1.1"
},
{
"status": "affected",
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},
{
"status": "affected",
"version": "17.1.1t"
},
{
"status": "affected",
"version": "17.1.3"
},
{
"status": "affected",
"version": "17.2.1"
},
{
"status": "affected",
"version": "17.2.1a"
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{
"status": "affected",
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{
"status": "affected",
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{
"status": "affected",
"version": "17.3.3"
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{
"status": "affected",
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{
"status": "affected",
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{
"status": "affected",
"version": "17.3.5"
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{
"status": "affected",
"version": "17.3.6"
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{
"status": "affected",
"version": "17.3.4b"
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{
"status": "affected",
"version": "17.3.7"
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{
"status": "affected",
"version": "17.3.8"
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{
"status": "affected",
"version": "17.3.8a"
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{
"status": "affected",
"version": "17.4.1"
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{
"status": "affected",
"version": "17.5.1"
},
{
"status": "affected",
"version": "17.6.1"
},
{
"status": "affected",
"version": "17.6.2"
},
{
"status": "affected",
"version": "17.6.3"
},
{
"status": "affected",
"version": "17.6.1y"
},
{
"status": "affected",
"version": "17.6.4"
},
{
"status": "affected",
"version": "17.6.5"
},
{
"status": "affected",
"version": "17.6.6"
},
{
"status": "affected",
"version": "17.6.6a"
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{
"status": "affected",
"version": "17.6.5a"
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{
"status": "affected",
"version": "17.6.7"
},
{
"status": "affected",
"version": "17.6.8"
},
{
"status": "affected",
"version": "17.7.1"
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{
"status": "affected",
"version": "17.10.1"
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"version": "17.10.1b"
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"version": "17.8.1"
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"version": "17.9.1"
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"version": "17.9.2"
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"version": "17.9.3"
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"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.5"
},
{
"status": "affected",
"version": "17.9.4a"
},
{
"status": "affected",
"version": "17.9.6"
},
{
"status": "affected",
"version": "17.9.6a"
},
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"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.12.1"
},
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"version": "17.12.2"
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"status": "affected",
"version": "17.12.3"
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"version": "17.12.4"
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"version": "17.12.1z3"
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"version": "17.13.1"
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"version": "17.14.1"
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"version": "17.11.99SW"
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"version": "17.15.1"
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"version": "17.15.2"
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"version": "17.15.2a"
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}
],
"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."
}
],
"metrics": [
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"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.4,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
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],
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"defects": [
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"dateUpdated": "2025-09-30T14:28:26.310Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
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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.
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