---
title: "CVE-2026-76478: Cisco Unified Communications - Broken Access Control"
description: "Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, Cisco Unified Communications Manager Session Management Edition, and Cisco Unity Connection contain improper access control vulnerabilities caused by insufficient authorization checks, letting attackers gain unauthorized access, exploit requires internal conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-76478/
---

# CVE-2026-76478 Cisco Unified Communications - Broken Access Control

Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, Cisco Unified Communications Manager Session Management Edition, and Cisco Unity Connection contain improper access control vulnerabilities caused by insufficient authorization checks, letting attackers gain unauthorized access, exploit requires internal conditions.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-76478)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Published

21 October 2026

Updated

22 October 2026

Weakness

[CWE-284](https://cwe.mitre.org/data/definitions/284.html)

## Vendor fix

Update to the latest software hardening releases provided by Cisco.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-76478](https://nvd.nist.gov/vuln/detail/CVE-2026-76478)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)