What’s Vulnerable › Vulnerabilities

CVE-2009-2056

• Severity: low (CVSS 3.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-08-21 · updated 2026-06-16
• Weakness: CWE-264

Description

Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.

Affected products

• Cisco IOS XR Software: through 3.8.1; 3.0, 3.0.1, 3.1, 3.1.0, 3.2, 3.2.1 (+25)

References

• http://securitytracker.com/id?1022756
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtml
• http://securitytracker.com/id?1022756
• http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtml

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