CVE-2011-2562
CVE-2011-2562 is a high-severity vulnerability in Cisco Unified Communications Manager with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 2.0 base score 7.8)
- EPSS exploit prediction: 1% (65th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Cisco Unified Communications Manager
- Published:
- Last modified:
Description
Unspecified vulnerability in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5)su2, 7.x before 7.1(5b)su3, 8.x before 8.0(3a)su1, and 8.5 before 8.5(1) allows remote attackers to cause a denial of service (service outage) via a SIP INVITE message, aka Bug ID CSCth43256.
Frequently asked questions
- What is CVE-2011-2562?
- Unspecified vulnerability in Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x before 6.1(5)su2, 7.x before 7.1(5b)su3, 8.x before 8.0(3a)su1, and 8.5 before 8.5(1) allows remote attackers to cause a denial of service (service outage) via a SIP INVITE message, aka Bug ID CSCth43256.
- How severe is CVE-2011-2562?
- CVE-2011-2562 has a CVSS 2.0 base score of 7.8, rated high severity.
- Is CVE-2011-2562 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-2562?
- CVE-2011-2562 primarily affects Cisco Unified Communications Manager. In total, 48 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-2562?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2011-2562 published?
- CVE-2011-2562 was published on 2011-08-29 and last updated on 2026-06-16.
References
Affected products (48)
- cpe:2.3:a:cisco:unified_communications_manager:6.0:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(1\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(1a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(1b\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(2\)su1a:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(3\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(3a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(3b\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(3b\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(4\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(4\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(4a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(4a\)su2:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(5\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:6.1\(5\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(1\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(1\)su1a:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(2\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(2a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(2a\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.0\(2a\)su2:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(2a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(2a\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(2b\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(2b\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3a\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3a\)su1a:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3b\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3b\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(3b\)su2:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5\)su1:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5\)su1a:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5a\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5b\):*:*:*:*:*:*:*
- cpe:2.3:a:cisco:unified_communications_manager:7.1\(5b\)su1:*:*:*:*:*:*:*
More vulnerabilities in Cisco Unified Communications Manager
- CVE-2025-20309 — Critical (CVSS 10.0): A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session…
- CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
- CVE-2011-1643 — Critical (CVSS 10.0): Cisco Unified Communications Manager (aka CUCM, formerly CallManager) 6.x, 7.x before 7.1(5b)su4, 8.0, and 8.5 before…
- CVE-2008-1154 — Critical (CVSS 10.0): The Disaster Recovery Framework (DRF) master server in Cisco Unified Communications products, including Unified…
- CVE-2008-0027 — Critical (CVSS 10.0): Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified…
- CVE-2007-5538 — Critical (CVSS 10.0): Buffer overflow in the Centralized TFTP File Locator Service in Cisco Unified Communications Manager (CUCM, formerly…