Security readout for executives and security teams
This vulnerability can let an unauthenticated remote actor reset BGP sessions on affected Cisco IOS XR routers by sending a malformed BGP update. The practical business risk is routing instability or outage on exposed edge infrastructure. It is listed in CISA KEV and was reported as seen in the wild in August 2009. Exposure is likely limited to organizations still operating affected Cisco IOS XR 3.4.0 through 3.8.1 on BGP-speaking routers. Internet-facing or peer-facing BGP infrastructure is the primary concern. The source bundle does not identify other products or platforms. Treat as high priority where affected Cisco IOS XR remains in routing infrastructure. Although old, KEV status and routing availability impact justify rapid inventory, remediation planning, and compensating monitoring. Mitigation focus: Check Cisco advisory for fixed IOS XR software and supported upgrade paths.; Prioritize affected BGP edge routers and route-reflector infrastructure.; Retire or isolate unsupported IOS XR 3.4.0 through 3.8.1 systems..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2009-2055 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-2055CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.