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TI-2026-78828 Aliases CVE-2026-76474GHSA-mmh2-pw7w-r7pw

Improper authentication in Cisco Unified Communications products

Priority MEDIUM 49CWE-287Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

Cisco Emergency Responder, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM and Presence Service and Cisco Unity Connection are affected in releases starting at 14. An improper authentication flaw (CWE-287) lets an unauthenticated remote attacker gain access that should require valid credentials. Successful exploitation can fully compromise confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams for Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), and Cisco Unity Connection have conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76474 are related to issues concerning improper authentication that are grouped under the Common Weakness Enumeration (CWE) Class CWE-287.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00474 41st 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
Yes
Technical impact
Total

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 Emergency Responder14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 15SU1a; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6—No fix listedCNA
CiscoCisco Unified Communications Manager14; 14SU1; 14SU2; 14SU3; 15; 15SU1; 14SU4; 14SU4a; 15SU1a; 15SU2; 15.0.1.13010-1; 15.0.1.13011-1; 15.0.1.13012-1; 15.0.1.13013-1; 15.0.1.13014-1; 15.0.1.13015-1; 15.0.1.13016-1; 15.0.1.13017-1; 15SU3a; 14SU5; 15SU4; 15SU4a; 14SU6—No fix listedCNA
CiscoCisco Unified Communications Manager IM and Presence Service14; 14SU1; 14SU2; 14SU2a; 14SU3; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6—No fix listedCNA
CiscoCisco Unity Connection14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6—No fix listedCNA
  • Cisco Emergency Responder VendorCisco Affected 14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 15SU1a; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6 Fixed in — No fix listed CNA
  • Cisco Unified Communications Manager VendorCisco Affected 14; 14SU1; 14SU2; 14SU3; 15; 15SU1; 14SU4; 14SU4a; 15SU1a; 15SU2; 15.0.1.13010-1; 15.0.1.13011-1; 15.0.1.13012-1; 15.0.1.13013-1; 15.0.1.13014-1; 15.0.1.13015-1; 15.0.1.13016-1; 15.0.1.13017-1; 15SU3a; 14SU5; 15SU4; 15SU4a; 14SU6 Fixed in — No fix listed CNA
  • Cisco Unified Communications Manager IM and Presence Service VendorCisco Affected 14; 14SU1; 14SU2; 14SU2a; 14SU3; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6 Fixed in — No fix listed CNA
  • Cisco Unity Connection VendorCisco Affected 14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 14SU4; 15SU2; 15SU3; 14SU5; 15SU4; 14SU6 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 3

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:cisco:emergency_responder:*:*:*:*:*:*:*:*——Cisco
cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:*——Cisco
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:*:*:*:*:*:*:*:*——Cisco
  • cpe:2.3:a:cisco:emergency_responder:*:*:*:*:*:*:*:* Versions — — ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager:*:*:*:*:*:*:*:* Versions — — ·Cisco
  • cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:*:*:*:*:*:*:*:* Versions — — ·Cisco

Remediation

The sources list no fixed version for Cisco Emergency Responder, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM and Presence Service or Cisco Unity Connection.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-76474
  2. 2026-10-21 Alias added: GHSA-mmh2-pw7w-r7pw
  3. 2026-10-22 CISA SSVC decision points changed
  4. 2026-10-23 CISA SSVC decision points changed

References

Other 1

  • TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53490 Cisco Catalyst SD-WAN Manager System Account Authorization Bypass Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53488 Cisco Identity Services Engine Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16388 Cisco Catalyst SD-WAN Controller Authentication Bypass Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-16344 Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
See all 7059 →

Sources

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