VULNERABILITY INTELLIGENCE

CVE-2009-2055

CVSS score5.9 MEDIUM
EPSS probability3.31%
CISA KEVKnown exploited vulnerability
Published2009-08-19
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Known Exploited Vulnerability

Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability

Vendor / product: Cisco / IOS XR

Description

Cisco IOS XR 3.4.0 through 3.8.1 allows remote attackers to cause a denial of service (session reset) via a BGP UPDATE message with an invalid attribute, as demonstrated in the wild on 17 August 2009.

Weakness classification

  • CWE-20: Improper Input Validation

Primary references