---
id: CVE-2026-76487
title: Cisco Unified Communications Manager Improper Access Control Vulnerability
summary: >-
  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 at…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-749
vendor: Cisco
product: Cisco Unified Communications Manager
affected:
  - unified_communications_manager 14
  - unified_communications_manager 14SU1
  - unified_communications_manager 14SU2
  - unified_communications_manager 14SU3
  - unified_communications_manager 15
  - unified_communications_manager 15SU1
  - unified_communications_manager 14SU4
  - unified_communications_manager 14SU4a
  - unified_communications_manager 15SU1a
  - unified_communications_manager 15SU2
  - unified_communications_manager 15.0.1.13010-1
  - unified_communications_manager 15.0.1.13011-1
  - unified_communications_manager 15.0.1.13012-1
  - unified_communications_manager 15.0.1.13013-1
  - unified_communications_manager 15.0.1.13014-1
  - unified_communications_manager 15.0.1.13015-1
  - unified_communications_manager 15.0.1.13016-1
  - unified_communications_manager 15.0.1.13017-1
  - unified_communications_manager 15SU3a
  - unified_communications_manager 14SU5
  - unified_communications_manager 15SU4
  - unified_communications_manager 15SU4a
  - unified_communications_manager 14SU6
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T16:16:54.579Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-76487'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-access-PW9e8Jt2
    label: cisco-sa-cucm-access-PW9e8Jt2
tags:
  - cve.org
ingestedAt: '2026-10-21T17:07:51.301Z'
---

## Overview

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.

## Affected

- `unified_communications_manager 14`
- `unified_communications_manager 14SU1`
- `unified_communications_manager 14SU2`
- `unified_communications_manager 14SU3`
- `unified_communications_manager 15`
- `unified_communications_manager 15SU1`
- `unified_communications_manager 14SU4`
- `unified_communications_manager 14SU4a`
- `unified_communications_manager 15SU1a`
- `unified_communications_manager 15SU2`
- `unified_communications_manager 15.0.1.13010-1`
- `unified_communications_manager 15.0.1.13011-1`
- `unified_communications_manager 15.0.1.13012-1`
- `unified_communications_manager 15.0.1.13013-1`
- `unified_communications_manager 15.0.1.13014-1`
- `unified_communications_manager 15.0.1.13015-1`
- `unified_communications_manager 15.0.1.13016-1`
- `unified_communications_manager 15.0.1.13017-1`
- `unified_communications_manager 15SU3a`
- `unified_communications_manager 14SU5`
- `unified_communications_manager 15SU4`
- `unified_communications_manager 15SU4a`
- `unified_communications_manager 14SU6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.