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CVE-2026-76487— Cisco Unified Communications Manager Improper Access Control Vulnerability

Quick assessment

Affected
Cisco Cisco Unified Communications Manager
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

思科统一通信管理器（Unified CM）和思科统一通信管理器会话管理版（Unified CM SME）中存在一个漏洞，该漏洞可能允许未经身份验证的远程攻击者对受影响设备发起访问控制绕过攻击。 此漏洞源于对特定 HTTP 请求的输入验证不当。攻击者可通过向受影响设备发送精心构造的 HTTP 请求来利用该漏洞。若攻击成功，攻击者将能够访问超出其授权范围的網絡部分。

CVSS 5.3 · Medium

Affected Version Matrix 23

VendorProduct Version RangeStatus
Cisco Cisco Unified Communications Manager 14 affected
14SU1 affected
14SU2 affected
14SU3 affected
15 affected
15SU1 affected
14SU4 affected
14SU4a affected
… +15 more rows
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I. Basic Information for CVE-2026-76487

Vulnerability Information
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Vulnerability Title
Cisco Unified Communications Manager Improper Access Control Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
暴露危险的方法或函数
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Unified Communications Manager 14 -

II. Public POCs for CVE-2026-76487

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III. Intelligence Information for CVE-2026-76487

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Other References for CVE-2026-76487 (1)

Same Patch Batch · Cisco · 2026-10-21 · 34 CVEs total

CVE-2026-76466 9.8 CRITICAL Cisco Expressway Series Remote Code Execution Vulnerability
CVE-2026-76473 9.8 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Improper control o
CVE-2026-76474 9.8 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentic
CVE-2026-76475 9.3 CRITICAL Cisco Unified Communications Products Hardening Release: October 2026 - Cross-site Scripti
CVE-2026-20043 9.0 CRITICAL Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-76477 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Injection Vulnerab
CVE-2026-76476 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Input Val
CVE-2026-76478 8.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Co
CVE-2026-76490 8.6 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Out-of-bounds Write Vul
CVE-2026-76524 7.8 HIGH Open Source Snort 3 Control Channel Socket Aribitrary Command Execution Vulnerability
CVE-2026-20291 7.8 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-76479 7.8 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Path Traversal Vul
CVE-2026-76494 7.8 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Code Injection Vulnerab
CVE-2026-76495 7.8 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Incorrect Permission As
CVE-2026-76491 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Denial of Service Vulne
CVE-2026-76492 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - NULL Pointer Vulnerabil
CVE-2026-76481 7.5 HIGH Cisco Unified Communications Products Hardening Release: October 2026 - Improper Check or
CVE-2026-76493 7.5 HIGH Cisco Expressway Series Software Hardening Release: October 2026 - Uncaught Exception Vuln
CVE-2026-20356 7.5 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
CVE-2026-20236 7.5 HIGH Multiple Cisco Products Snort 3 Software Hardening Release: October 2026

Showing top 20 of 34 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Cisco Unified Communications Manager
Same vendor: Cisco
Same weakness: CWE-749

V. Comments for CVE-2026-76487

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