Off-by-one error in the Certificate Trust List (CTL) Provider service (CTLProvider.exe)…
Priority MEDIUM 52Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Off-by-one error in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified Communications Manager (CUCM, formerly CallManager) before 20070711 allow remote attackers to execute arbitrary code via a crafted packet that triggers a heap-based buffer overflow.
Why it matters now
EPSS 0.09569 95th 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_callmanager:*:*:*:*:*:*:*:* | 3.3 – 3.3\(5\)sr2; 4.1 – 4.1\(3\)sr4; 4.2 – 4.2\(3\)sr1 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_callmanager:5.0:*:*:*:*:*:*:* | 5.0 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:* | 4.3 – 4.3\(1\); 5.1 – 5.1\(1\) | Vulnerable | Cisco |
- cpe:2.3:a:cisco:unified_callmanager:*:*:*:*:*:*:*:* Versions 3.3 – 3.3\(5\)sr2; 4.1 – 4.1\(3\)sr4; 4.2 – 4.2\(3\)sr1 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_callmanager:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Cisco
- cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:* Versions 4.3 – 4.3\(1\); 5.1 – 5.1\(1\) Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-5277
- 2026-10-03 Alias added: GHSA-cj86-xvvm-mh59
References
More Cisco Unified Callmanager vulnerabilities
- TI-2008-00019 Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service… CVSS 2.0HIGH 10.0
- TI-2006-05092 Integer overflow in the Real-Time Information Server (RIS) Data Collector service… CVSS 2.0HIGH 10.0
- TI-2007-05323 Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified… CVSS 2.0HIGH 10.0
- TI-2006-05364 Cisco Security Agent (CSA) for Linux 4.5 before 4.5.1.657 and 5.0 before 5.0.0.193, as… CVSS 2.0HIGH 7.8
- TI-2009-02727 Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 5.x before 5.1(3g)… CVSS 2.0HIGH 7.8
- TI-2006-03486 Buffer overflow in Cisco Unified CallManager (CUCM) 5.0(1) through 5.0(3a) allows remote… CVSS 2.0HIGH 7.5
Sources
- CVE-2006-5277 · CVE Program
- CVE-2006-5277 · NVD
- FIRST EPSS
- GHSA-cj86-xvvm-mh59 · GitHub Advisory Database · CC BY 4.0
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