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TI-2021-01133 Aliases CVE-2021-1406GHSA-495g-cj2m-hr56

Cisco Unified Communications Manager Information Disclosure Vulnerability

Priority LOW 25CWE-538Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-200.

Summary

A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an authenticated, remote attacker to access sensitive information on an affected device. The vulnerability is due to improper inclusion of sensitive information in downloadable files. An attacker could exploit this vulnerability by authenticating to an affected device and issuing a specific set of commands. A successful exploit could allow the attacker to obtain hashed credentials of system users. To exploit this vulnerability an attacker would need to have valid user credentials with elevated privileges.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01119 66th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Unified Communications Managerall versions—No fix listedCNA
  • Cisco Unified Communications Manager VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 61

CPEVersionsRoleVendor
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:-:*:*:*10.5(2)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:session_management:*:*:*10.5(2)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su1:*:*:*:-:*:*:*10.5(2)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su1:*:*:*:session_management:*:*:*10.5(2)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2:*:*:*:-:*:*:*10.5(2)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2:*:*:*:session_management:*:*:*10.5(2)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2a:*:*:*:-:*:*:*10.5(2)su2aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2a:*:*:*:session_management:*:*:*10.5(2)su2aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3:*:*:*:-:*:*:*10.5(2)su3VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3:*:*:*:session_management:*:*:*10.5(2)su3VulnerableCisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:-:*:*:* Versions 10.5(2) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\):*:*:*:session_management:*:*:* Versions 10.5(2) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su1:*:*:*:-:*:*:* Versions 10.5(2)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su1:*:*:*:session_management:*:*:* Versions 10.5(2)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2:*:*:*:-:*:*:* Versions 10.5(2)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2:*:*:*:session_management:*:*:* Versions 10.5(2)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2a:*:*:*:-:*:*:* Versions 10.5(2)su2a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su2a:*:*:*:session_management:*:*:* Versions 10.5(2)su2a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3:*:*:*:-:*:*:* Versions 10.5(2)su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3:*:*:*:session_management:*:*:* Versions 10.5(2)su3 Vulnerable ·Cisco
Show 51 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3a:*:*:*:-:*:*:*10.5(2)su3aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3a:*:*:*:session_management:*:*:*10.5(2)su3aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4:*:*:*:-:*:*:*10.5(2)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4:*:*:*:session_management:*:*:*10.5(2)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4a:*:*:*:-:*:*:*10.5(2)su4aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4a:*:*:*:session_management:*:*:*10.5(2)su4aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su5:*:*:*:*:*:*:*10.5(2)su5VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6:*:*:*:-:*:*:*10.5(2)su6VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6:*:*:*:session_management:*:*:*10.5(2)su6VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6a:*:*:*:-:*:*:*10.5(2)su6aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6a:*:*:*:session_management:*:*:*10.5(2)su6aVulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su7:*:*:*:-:*:*:*10.5(2)su7VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su7:*:*:*:session_management:*:*:*10.5(2)su7VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su8:*:*:*:-:*:*:*10.5(2)su8VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su8:*:*:*:session_management:*:*:*10.5(2)su8VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su9:*:*:*:-:*:*:*10.5(2)su9VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su9:*:*:*:session_management:*:*:*10.5(2)su9VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su10:*:*:*:-:*:*:*10.5(2)su10VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su10:*:*:*:session_management:*:*:*10.5(2)su10VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\):*:*:*:-:*:*:*11.5(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\):*:*:*:session_management:*:*:*11.5(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su1:*:*:*:-:*:*:*11.5(1)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su1:*:*:*:session_management:*:*:*11.5(1)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su2:*:*:*:-:*:*:*11.5(1)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su2:*:*:*:session_management:*:*:*11.5(1)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su3:*:*:*:-:*:*:*11.5(1)su3VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su3:*:*:*:session_management:*:*:*11.5(1)su3VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su4:*:*:*:-:*:*:*11.5(1)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su4:*:*:*:session_management:*:*:*11.5(1)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su5:*:*:*:-:*:*:*11.5(1)su5VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su5:*:*:*:session_management:*:*:*11.5(1)su5VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su7:*:*:*:-:*:*:*11.5(1)su7VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su7:*:*:*:session_management:*:*:*11.5(1)su7VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su8:*:*:*:-:*:*:*11.5(1)su8VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su8:*:*:*:session_management:*:*:*11.5(1)su8VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su9:*:*:*:-:*:*:*11.5(1)su9VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su9:*:*:*:session_management:*:*:*11.5(1)su9VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:-:*:*:*12.0(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:session_management:*:*:*12.0(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:*12.5(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:*12.5(1)VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su1:*:*:*:-:*:*:*12.5(1)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su1:*:*:*:session_management:*:*:*12.5(1)su1VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su2:*:*:*:-:*:*:*12.5(1)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su2:*:*:*:session_management:*:*:*12.5(1)su2VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su3:*:*:*:-:*:*:*12.5(1)su3VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su3:*:*:*:session_management:*:*:*12.5(1)su3VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su4:*:*:*:-:*:*:*12.5(1)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su4:*:*:*:session_management:*:*:*12.5(1)su4VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su5:*:*:*:-:*:*:*12.5(1)su5VulnerableCisco
cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su5:*:*:*:session_management:*:*:*12.5(1)su5VulnerableCisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3a:*:*:*:-:*:*:* Versions 10.5(2)su3a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su3a:*:*:*:session_management:*:*:* Versions 10.5(2)su3a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4:*:*:*:-:*:*:* Versions 10.5(2)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4:*:*:*:session_management:*:*:* Versions 10.5(2)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4a:*:*:*:-:*:*:* Versions 10.5(2)su4a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su4a:*:*:*:session_management:*:*:* Versions 10.5(2)su4a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su5:*:*:*:*:*:*:* Versions 10.5(2)su5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6:*:*:*:-:*:*:* Versions 10.5(2)su6 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6:*:*:*:session_management:*:*:* Versions 10.5(2)su6 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6a:*:*:*:-:*:*:* Versions 10.5(2)su6a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su6a:*:*:*:session_management:*:*:* Versions 10.5(2)su6a Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su7:*:*:*:-:*:*:* Versions 10.5(2)su7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su7:*:*:*:session_management:*:*:* Versions 10.5(2)su7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su8:*:*:*:-:*:*:* Versions 10.5(2)su8 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su8:*:*:*:session_management:*:*:* Versions 10.5(2)su8 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su9:*:*:*:-:*:*:* Versions 10.5(2)su9 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su9:*:*:*:session_management:*:*:* Versions 10.5(2)su9 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su10:*:*:*:-:*:*:* Versions 10.5(2)su10 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:10.5\(2\)su10:*:*:*:session_management:*:*:* Versions 10.5(2)su10 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\):*:*:*:-:*:*:* Versions 11.5(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\):*:*:*:session_management:*:*:* Versions 11.5(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su1:*:*:*:-:*:*:* Versions 11.5(1)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su1:*:*:*:session_management:*:*:* Versions 11.5(1)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su2:*:*:*:-:*:*:* Versions 11.5(1)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su2:*:*:*:session_management:*:*:* Versions 11.5(1)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su3:*:*:*:-:*:*:* Versions 11.5(1)su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su3:*:*:*:session_management:*:*:* Versions 11.5(1)su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su4:*:*:*:-:*:*:* Versions 11.5(1)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su4:*:*:*:session_management:*:*:* Versions 11.5(1)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su5:*:*:*:-:*:*:* Versions 11.5(1)su5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su5:*:*:*:session_management:*:*:* Versions 11.5(1)su5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su7:*:*:*:-:*:*:* Versions 11.5(1)su7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su7:*:*:*:session_management:*:*:* Versions 11.5(1)su7 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su8:*:*:*:-:*:*:* Versions 11.5(1)su8 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su8:*:*:*:session_management:*:*:* Versions 11.5(1)su8 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su9:*:*:*:-:*:*:* Versions 11.5(1)su9 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:11.5\(1\)su9:*:*:*:session_management:*:*:* Versions 11.5(1)su9 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:-:*:*:* Versions 12.0(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.0\(1\):*:*:*:session_management:*:*:* Versions 12.0(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:-:*:*:* Versions 12.5(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\):*:*:*:session_management:*:*:* Versions 12.5(1) Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su1:*:*:*:-:*:*:* Versions 12.5(1)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su1:*:*:*:session_management:*:*:* Versions 12.5(1)su1 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su2:*:*:*:-:*:*:* Versions 12.5(1)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su2:*:*:*:session_management:*:*:* Versions 12.5(1)su2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su3:*:*:*:-:*:*:* Versions 12.5(1)su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su3:*:*:*:session_management:*:*:* Versions 12.5(1)su3 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su4:*:*:*:-:*:*:* Versions 12.5(1)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su4:*:*:*:session_management:*:*:* Versions 12.5(1)su4 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su5:*:*:*:-:*:*:* Versions 12.5(1)su5 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:12.5\(1\)su5:*:*:*:session_management:*:*:* Versions 12.5(1)su5 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1406
  2. 2026-10-03 Alias added: GHSA-495g-cj2m-hr56

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