Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before…
Priority MEDIUM 40Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Cisco IOS 12.2 through 12.4 and 15.0 through 15.1, Cisco IOS XE 2.5.x and 2.6.x before 2.6.1, and Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 4.x, 5.x before 5.1(3g), 6.x before 6.1(4), and 7.x before 7.1(2) allow remote attackers to cause a denial of service (device reload or voice-services outage) via a malformed SIP INVITE message that triggers an improper call to the sipSafeStrlen function, aka Bug IDs CSCsz40392 and CSCsz43987.
Why it matters now
EPSS 0.03436 89th 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:* | 5.0 to before 5.1\(3g\); 6.1\(1\) to before 6.1\(4\); 7.1 to before 7.1\(2\) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* | 12.2 – 12.4; 15.0 – 15.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* | 2.5.0 – 2.6.1 | Vulnerable | Cisco |
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:* Versions 5.0 to before 5.1\(3g\); 6.1\(1\) to before 6.1\(4\); 7.1 to before 7.1\(2\) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* Versions 12.2 – 12.4; 15.0 – 15.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions 2.5.0 – 2.6.1 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2009-2051
- 2026-10-03 Alias added: GHSA-mp73-2m32-64h6
References
More Cisco Ios vulnerabilities
- TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2009-2051 · CVE Program
- CVE-2009-2051 · NVD
- FIRST EPSS
- GHSA-mp73-2m32-64h6 · GitHub Advisory Database · CC BY 4.0
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