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TI-2009-01964 Aliases CVE-2009-2056GHSA-mc68-3chj-wmp4

Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of…

Priority LOW 19CWE-264Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-264.

Summary

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.

Why it matters now

EPSS 0.01336 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 33

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*up to 3.8.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.0:*:*:*:*:*:*:*3.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.0.1:*:*:*:*:*:*:*3.0.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.1:*:*:*:*:*:*:*3.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.1.0:*:*:*:*:*:*:*3.1.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2:*:*:*:*:*:*:*3.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2.1:*:*:*:*:*:*:*3.2.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2.2:*:*:*:*:*:*:*3.2.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2.3:*:crs-1:*:*:*:*:*3.2.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2.3:*:prp:*:*:*:*:*3.2.3VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions up to 3.8.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.0.1:*:*:*:*:*:*:* Versions 3.0.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.1.0:*:*:*:*:*:*:* Versions 3.1.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2:*:*:*:*:*:*:* Versions 3.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2.1:*:*:*:*:*:*:* Versions 3.2.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2.2:*:*:*:*:*:*:* Versions 3.2.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2.3:*:crs-1:*:*:*:*:* Versions 3.2.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2.3:*:prp:*:*:*:*:* Versions 3.2.3 Vulnerable ·Cisco
Show 23 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:3.2.4:*:*:*:*:*:*:*3.2.4VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.2.50:*:*:*:*:*:*:*3.2.50VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.3:*:*:*:*:*:*:*3.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.4:*:*:*:*:*:*:*3.4VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.4.0:*:*:*:*:*:*:*3.4.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.4.1:*:*:*:*:*:*:*3.4.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.4.2:*:*:*:*:*:*:*3.4.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.4.3:*:*:*:*:*:*:*3.4.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.5:*:*:*:*:*:*:*3.5VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.5.2:*:*:*:*:*:*:*3.5.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.5.3:*:*:*:*:*:*:*3.5.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.5.4:*:*:*:*:*:*:*3.5.4VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.6:*:*:*:*:*:*:*3.6VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:*3.6.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:*3.6.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:*3.6.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:*3.6.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.7:*:*:*:*:*:*:*3.7VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.7.0:*:*:*:*:*:*:*3.7.0VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.7.1:*:*:*:*:*:*:*3.7.1VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.7.2:*:*:*:*:*:*:*3.7.2VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.7.3:*:*:*:*:*:*:*3.7.3VulnerableCisco
cpe:2.3:o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:*3.8.0VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:3.2.4:*:*:*:*:*:*:* Versions 3.2.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.2.50:*:*:*:*:*:*:* Versions 3.2.50 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.4:*:*:*:*:*:*:* Versions 3.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.4.1:*:*:*:*:*:*:* Versions 3.4.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.5:*:*:*:*:*:*:* Versions 3.5 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.5.2:*:*:*:*:*:*:* Versions 3.5.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.5.3:*:*:*:*:*:*:* Versions 3.5.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.5.4:*:*:*:*:*:*:* Versions 3.5.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.6:*:*:*:*:*:*:* Versions 3.6 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:* Versions 3.6.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:* Versions 3.6.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:* Versions 3.6.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:* Versions 3.6.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.7:*:*:*:*:*:*:* Versions 3.7 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.7.0:*:*:*:*:*:*:* Versions 3.7.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.7.1:*:*:*:*:*:*:* Versions 3.7.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.7.2:*:*:*:*:*:*:* Versions 3.7.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.7.3:*:*:*:*:*:*:* Versions 3.7.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:* Versions 3.8.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-2056
  2. 2026-10-03 Alias added: GHSA-mc68-3chj-wmp4

References

Patch 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences