7.4

CVE-2025-20311: cisco cisco ios xe software Data Processing Errors

CVSS: 7.4v3.1HighAnalyzed
Published 24-09-2025Last modified 30-09-2025
Open JSON

Vulnerability summary

CVE-2025-20311 is a high (CVSS 7.4) Data Processing Errors vulnerability in cisco cisco ios xe software. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.5% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-09-2025
    PublishedVulnerability first disclosed.
  2. 30-09-2025
    Last modifiedVulnerability information updated.

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 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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products
  • cisco 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
  • ios_xe16.6.1 | 16.6.2 | 16.6.3 | 16.6.4 | 16.6.4a | 16.6.5 | 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 | 16.9.1s | 16.9.2 | 16.9.3 | 16.9.4 | 16.9.5 | 16.9.6 | 16.9.7 | 16.9.8 | 16.10.1 | 16.10.1e | 16.10.1s | 16.11.1 | 16.11.1b | 16.11.1s | 16.12.1 | 16.12.1c | 16.12.1s | 16.12.2 | 16.12.2s | 16.12.3 | 16.12.3a | 16.12.3s | 16.12.4 | 16.12.4a | 16.12.5 | 16.12.5b | 16.12.6 | 16.12.6a | 16.12.7 | 16.12.8 | 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 | 17.3.2a | 17.3.3 | 17.3.4 | 17.3.4b | 17.3.5 | 17.3.6 | 17.3.7 | 17.3.8 | 17.3.8a | 17.4.1 | 17.5.1 | 17.6.1 | 17.6.1y | 17.6.2 | 17.6.3 | 17.6.4 | 17.6.5 | 17.6.5a | 17.6.6 | 17.6.6a | 17.6.7 | 17.6.8 | 17.7.1 | 17.8.1 | 17.9.1 | 17.9.2 | 17.9.3 | 17.9.4 | 17.9.4a | 17.9.5 | 17.9.6 | 17.9.6a | 17.10.1 | 17.10.1b | 17.11.1 | 17.11.99sw | 17.12.1 | 17.12.1z3 | 17.12.2 | 17.12.3 | 17.12.4 | 17.13.1 | 17.14.1 | 17.15.1 | 17.15.2 | 17.15.2a | 17.15.2b | 17.16.1

1 vendor · 2 products

References

1 links