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CVE-2009-2055: Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability

criticalknown exploitedCVE-2009-2055
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Cisco IOS XR,when BGP is the configured routing feature, allows remote attackers to cause a denial-of-service (DoS).

CSIRTS triage

vendor: Ciscoproduct: IOS XRDenial of serviceOther
What
A vulnerability in BGP can be exploited to cause a denial-of-service condition.
Who is affected
Deployments of Cisco IOS XR with BGP configured are affected.
Urgency
Remediation is critical due to the severity of the denial-of-service risk and active exploitation.
Action
Implement the recommended patches or mitigations from Cisco.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-25
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2009-2055

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2009-2055coverage & exploitation statusNVD · CVE.org

Recent advisories for Cisco IOS XR

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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