Medium · CVSS 5.3CVE-2026-76487

Cisco Unified Communications Manager Improper Access Control VulnerabilityCVE-2026-76487

Answer in brief

CVE-2026-76487 records a Medium severity (CVSS 5.3) vulnerability in Cisco Unified Communications Manager Improper Access Control Vulnerability. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Unified Communications Manager (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Cisco/Cisco Unified Communications Manager (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Cisco/Cisco Unified Communications Managergeneric	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	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Cisco/Cisco Unified Communications Manager.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 21, 2026

Sources and claim methodology

Source referencesec.cloudapps.cisco.com

Upstream source description

A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct access control bypass attacks on an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to access parts of the network that are beyond the scope of their intended access.

Quoted source text, attributed separately from HOL analysis.