01 Record
CVE-2025-20311
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
HighPUBLISHEDCNA: cisco
CNA base score7.4 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
02 Description
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
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.20% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 9.9% of scored records. A rank, not a probability.
- NVD base score
- 7.4 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-09-26.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-09-24 17:12Z1 YR AGO
- Last updated
- 2025-09-30 14:28Z1 YR AGO
- Reserved
- 2024-10-10
- Assigning CNA
- cisco
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.4)
- CNA CVSS vector
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.1
- Document digest
- c5186416f8515821bc0fe5f55fad118076f72ccc89612342ab09389c2a42e37f
05 Affected products
VendorProductVersionsPlatforms
CiscoCisco IOS XE Software16.6.1, 16.6.2, 16.6.3, 16.6.4, 16.6.5, 16.6.4a, 16.6.6, 16.6.7, 16.6.8, 16.6.9, 16.6.10, 16.7.1, 16.8.1, 16.8.1a, 16.8.1s, 16.9.1, 16.9.2, 16.9.1s, 16.9.3, 16.9.4, 16.9.5, 16.9.6, 16.9.7, 16.9.8, 16.10.1, 16.10.1s, 16.10.1e, 16.11.1, 16.11.1b, 16.11.1s, 16.12.1, 16.12.1s, 16.12.1c, 16.12.2, 16.12.3, 16.12.8, 16.12.2s, 16.12.4, 16.12.3s, 16.12.3a, 16.12.4a, 16.12.5, 16.12.6, 16.12.5b, 16.12.6a, 16.12.7, 16.12.14, 17.1.1, 17.1.1s, 17.1.1t, 17.1.3, 17.2.1, 17.2.1a, 17.3.1, 17.3.2, 17.3.3, 17.3.2a, 17.3.4, 17.3.5, 17.3.6, 17.3.4b, 17.3.7, 17.3.8, 17.3.8a, 17.4.1, 17.5.1, 17.6.1, 17.6.2, 17.6.3, 17.6.1y, 17.6.4, 17.6.5, 17.6.6, 17.6.6a, 17.6.5a, 17.6.7, 17.6.8, 17.7.1, 17.10.1, 17.10.1b, 17.8.1, 17.9.1, 17.9.2, 17.9.3, 17.9.4, 17.9.5, 17.9.4a, 17.9.6, 17.9.6a, 17.11.1, 17.12.1, 17.12.2, 17.12.3, 17.12.4, 17.12.1z3, 17.13.1, 17.14.1, 17.11.99SW, 17.15.1, 17.15.2, 17.15.2a, 17.15.2b, 17.16.1—
06 References
- sec.cloudapps.cisco.comcisco-sa-cat9k-PtmD7bgyhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cat9k-PtmD7bgy