5.3

CVE-2025-20159: cisco cisco ios xr software Improper Access Control

CVSS: 5.3v3.1MediumDeferred
Published 10-09-2025Last modified 10-09-2025
Open JSON

Vulnerability summary

CVE-2025-20159 is a medium (CVSS 5.3) Improper Access Control vulnerability in cisco cisco ios xr software. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 22.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.32%
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. 10-09-2025
    PublishedVulnerability first disclosed.
  2. 10-09-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability in the management interface access control list (ACL) processing feature in Cisco IOS XR Software could allow an unauthenticated, remote attacker to bypass configured ACLs for the SSH, NetConf, and gRPC features. This vulnerability exists because management interface ACLs have not been supported on Cisco IOS XR Software Packet I/O infrastructure platforms for Linux-handled features such as SSH, NetConf, or gRPC. An attacker could exploit this vulnerability by attempting to send traffic to an affected device. A successful exploit could allow the attacker to bypass an ingress ACL that is applied on the management interface of the affected device.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.32%

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

Cisco1 product
  • cisco ios xr software6.6.1 | 6.5.3 | 7.0.1 | 6.6.11 | 6.5.1 | 6.5.2 | 6.6.2 | 6.6.12 | 6.6.25 | 7.1.1 | 7.0.90 | 6.6.3 | 7.0.2 | 7.1.2 | 7.2.1 | 7.0.11 | 7.0.12 | 7.0.14 | 6.6.4 | 7.2.12 | 7.3.1 | 7.4.1 | 7.2.2 | 7.3.15 | 7.3.16 | 7.4.15 | 7.3.2 | 7.5.1 | 7.4.16 | 7.3.27 | 7.6.1 | 7.5.2 | 7.8.1 | 7.6.15 | 7.5.12 | 7.8.12 | 7.3.4 | 7.3.3 | 7.4.2 | 7.7.1 | 7.6.2 | 7.5.3 | 7.7.2 | 7.9.1 | 7.10.1 | 7.8.2 | 7.5.4 | 7.8.22 | 7.7.21 | 7.9.2 | 7.3.5 | 7.5.5 | 7.11.1 | 7.10.2 | 24.1.1 | 7.3.6 | 7.5.52 | 7.11.2 | 24.2.1 | 24.1.2 | 24.2.11 | 24.3.1 | 24.4.1 | 24.2.2 | 7.11.21 | 24.2.20 | 24.3.2 | 25.1.1 | 24.4.2 | 24.3.20 | 25.1.2 | 24.3.30 | 24.4.30 | 24.2.21

1 vendor · 1 product

References

1 links