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TI-2023-06823 Aliases CVE-2023-20116GHSA-4mm9-fmg4-q68j

Infinite loop in Cisco Unified Communications Manager

Priority LOW 31CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-835.

Summary

A vulnerability in the Administrative XML Web Service (AXL) API of Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation of user-supplied input to the web UI of the Self Care Portal. An attacker could exploit this vulnerability by sending crafted HTTP input to an affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.

Why it matters now

EPSS 0.0071 53rd 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
CiscoCisco Unified Communications Manager12.0(1)SU1; 12.0(1)SU2; 12.0(1)SU3; 12.0(1)SU4; 12.0(1)SU5; 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 12.5(1)SU5; 12.5(1)SU6; 12.5(1)SU7; 12.5(1)SU7a; 14; 14SU1; 14SU2—No fix listedCNA
CiscoCisco Unified Communications Manager / Cisco Unity Connection10.5(2)SU10; 10.5(1); 10.5(1)SU1; 10.5(1)SU1a; 10.5(2); 10.5(2)SU1; 10.5(2)SU2; 10.5(2)SU3; 10.5(2)SU4; 10.5(2)SU5; 10.5(2)SU6; 10.5(2)SU7; 10.5(2)SU8; 10.5(2)SU9; 10.5(2)SU2a; 10.5(2)SU3a; 10.5(2)SU4a; 10.5(2)SU6a; 11.0(1); 11.0(1a); 11.0(1a)SU1; 11.0(1a)SU2; 11.0(1a)SU3; 11.0(1a)SU3a; 11.0(1a)SU4; 11.0.1; 11.0.2; 11.0.5; 11.5(1); 11.5(1)SU1; 11.5(1)SU2; 11.5(1)SU3; 11.5(1)SU3a; 11.5(1)SU3b; 11.5(1)SU4; 11.5(1)SU5; 11.5(1)SU6; 11.5(1)SU7; 11.5(1)SU8; 11.5(1)SU9; 11.5(1)SU10; 11.5(1)SU11; 10.0(1)SU2; 10.0(1); 10.0(1)SU1—No fix listedCNA
  • Cisco Unified Communications Manager VendorCisco Affected 12.0(1)SU1; 12.0(1)SU2; 12.0(1)SU3; 12.0(1)SU4; 12.0(1)SU5; 12.5(1); 12.5(1)SU1; 12.5(1)SU2; 12.5(1)SU3; 12.5(1)SU4; 12.5(1)SU5; 12.5(1)SU6; 12.5(1)SU7; 12.5(1)SU7a; 14; 14SU1; 14SU2 Fixed in — No fix listed CNA
  • Cisco Unified Communications Manager / Cisco Unity Connection VendorCisco Affected 10.5(2)SU10; 10.5(1); 10.5(1)SU1; 10.5(1)SU1a; 10.5(2); 10.5(2)SU1; 10.5(2)SU2; 10.5(2)SU3; 10.5(2)SU4; 10.5(2)SU5; 10.5(2)SU6; 10.5(2)SU7; 10.5(2)SU8; 10.5(2)SU9; 10.5(2)SU2a; 10.5(2)SU3a; 10.5(2)SU4a; 10.5(2)SU6a; 11.0(1); 11.0(1a); 11.0(1a)SU1; 11.0(1a)SU2; 11.0(1a)SU3; 11.0(1a)SU3a; 11.0(1a)SU4; 11.0.1; 11.0.2; 11.0.5; 11.5(1); 11.5(1)SU1; 11.5(1)SU2; 11.5(1)SU3; 11.5(1)SU3a; 11.5(1)SU3b; 11.5(1)SU4; 11.5(1)SU5; 11.5(1)SU6; 11.5(1)SU7; 11.5(1)SU8; 11.5(1)SU9; 11.5(1)SU10; 11.5(1)SU11; 10.0(1)SU2; 10.0(1); 10.0(1)SU1 Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPEVersionsRoleVendor
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):*:*:*:*:*:*:*11.5(1.10000.6)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):*:*:*:session_management:*:*:*11.5(1.10000.6)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):*:*:*:*:*:*:*12.0(1.10000.10)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):*:*:*:session_management:*:*:*12.0(1.10000.10)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1.10000.22\):*:*:*:*:*:*:*12.5(1.10000.22)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1.10000.22\):*:*:*:session_management:*:*:*12.5(1.10000.22)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:*:*:*:*14.0(1.10000.20)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:session_management:*:*:*14.0(1.10000.20)VulnerableCisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):*:*:*:*:*:*:* Versions 11.5(1.10000.6) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1.10000.6\):*:*:*:session_management:*:*:* Versions 11.5(1.10000.6) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):*:*:*:*:*:*:* Versions 12.0(1.10000.10) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.0\(1.10000.10\):*:*:*:session_management:*:*:* Versions 12.0(1.10000.10) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1.10000.22\):*:*:*:*:*:*:* Versions 12.5(1.10000.22) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1.10000.22\):*:*:*:session_management:*:*:* Versions 12.5(1.10000.22) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:*:*:*:* Versions 14.0(1.10000.20) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:14.0\(1.10000.20\):*:*:*:session_management:*:*:* Versions 14.0(1.10000.20) Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-20116
  2. 2026-10-03 Alias added: GHSA-4mm9-fmg4-q68j
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2026-16259 Cisco Unified Communications Products Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16423 Cisco Unified Communications Manager Server-Side Request Forgery Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2008-00019 Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service… CVSS 2.0HIGH 10.0
  • TI-2013-05779 The TFTP service in Cisco Unified Communications Manager (aka CUCM or Unified CM) allows… CVSS 3.1HIGH 7.3
  • TI-2011-02932 Directory traversal vulnerability in Cisco Unified Communications Manager (CUCM) 5.x and… CVSS 2.0HIGH 7.8
See all 238 →

Sources

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