8.6

CVE-2025-20115: cisco cisco ios xr software Classic Buffer Overflow

CVSS: 8.6v3.1HighAnalyzed
Published 12-03-2025Last modified 21-03-2025
Open JSON

Vulnerability summary

CVE-2025-20115 is a high (CVSS 8.6) Classic Buffer Overflow vulnerability in cisco cisco ios xr software. EPSS estimates a 0.90% chance of exploitation in the next 30 days, higher than 59% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.6/10
010
High · v3.1 (CVE.org)
EPSS score
0.90%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-03-2025
    PublishedVulnerability first disclosed.
  2. 21-03-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability in confederation implementation for the Border Gateway Protocol (BGP) in Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to a memory corruption that occurs when a BGP update is created with an AS_CONFED_SEQUENCE attribute that has 255 autonomous system numbers (AS numbers). An attacker could exploit this vulnerability by sending a crafted BGP update message, or the network could be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more. A successful exploit could allow the attacker to cause memory corruption, which may cause the BGP process to restart, resulting in a DoS condition. To exploit this vulnerability, an attacker must control a BGP confederation speaker within the same autonomous system as the victim, or the network must be designed in such a manner that the AS_CONFED_SEQUENCE attribute grows to 255 AS numbers or more.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.90%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

+0.02 pp

From 0.88% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.90%

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 xr software6.5.3 | 6.5.29 | 6.5.1 | 6.6.1 | 6.5.2 | 6.5.92 | 6.5.15 | 6.6.2 | 7.0.1 | 6.6.25 | 6.5.26 | 6.6.11 | 6.5.25 | 6.5.28 | 6.5.93 | 6.6.12 | 6.5.90 | 7.0.0 | 7.1.1 | 7.0.90 | 6.6.3 | 6.7.1 | 7.0.2 | 7.1.15 | 7.2.0 | 7.2.1 | 7.1.2 | 6.7.2 | 7.0.11 | 7.0.12 | 7.0.14 | 7.1.25 | 6.6.4 | 7.2.12 | 7.3.1 | 7.1.3 | 6.7.3 | 7.4.1 | 7.2.2 | 6.7.4 | 6.5.31 | 7.3.15 | 7.3.16 | 6.8.1 | 7.4.15 | 6.5.32 | 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 | 7.3.3 | 7.7.1 | 6.8.2 | 7.3.4 | 7.4.2 | 6.7.35 | 6.9.1 | 7.6.2 | 7.5.3 | 7.7.2 | 6.9.2 | 7.9.1 | 7.10.1 | 7.8.2 | 7.5.4 | 6.5.33 | 7.8.22 | 7.7.21 | 7.9.2 | 7.3.5 | 7.5.5 | 7.11.1 | 7.9.21 | 7.10.2 | 24.1.1 | 7.6.3 | 7.3.6 | 7.5.52 | 7.11.2 | 24.2.1 | 24.1.2 | 24.2.11 | 24.2.2 | 7.8.23 | 7.11.21 | 24.2.20 | 6.5.35
  • ios_xr6.5.1 | 6.5.2 | 6.5.3 | 6.5.15 | 6.5.25 | 6.5.26 | 6.5.28 | 6.5.29 | 6.5.31 | 6.5.32 | 6.5.33 | 6.5.35 | 6.5.90 | 6.5.92 | 6.5.93 | 6.6.1 | 6.6.2 | 6.6.3 | 6.6.4 | 6.6.11 | 6.6.12 | 6.6.25 | 6.7.1 | 6.7.2 | 6.7.3 | 6.7.4 | 6.7.35 | 6.8.1 | 6.8.2 | 6.9.1 | 6.9.2 | 7.0.0 | 7.0.1 | 7.0.2 | 7.0.11 | 7.0.12 | 7.0.14 | 7.0.90 | 7.1.1 | 7.1.2 | 7.1.3 | 7.1.15 | 7.1.25 | 7.2.0 | 7.2.1 | 7.2.2 | 7.2.12 | 7.3.1 | 7.3.2 | 7.3.3 | 7.3.4 | 7.3.5 | 7.3.6 | 7.3.15 | 7.3.16 | 7.3.27 | 7.4.1 | 7.4.2 | 7.4.15 | 7.4.16 | 7.5.1 | 7.5.2 | 7.5.3 | 7.5.4 | 7.5.5 | 7.5.12 | 7.5.52 | 7.6.1 | 7.6.2 | 7.6.3 | 7.6.15 | 7.7.1 | 7.7.2 | 7.7.21 | 7.8.1 | 7.8.2 | 7.8.12 | 7.8.22 | 7.8.23 | 7.9.1 | 7.9.2 | 7.9.21 | 7.10.1 | 7.10.2 | 7.11.1 | 7.11.2 | 7.11.21 | 24.1.1 | 24.1.2 | 24.2.1 | 24.2.2 | 24.2.11 | 24.2.20

1 vendor · 2 products

References

2 links