Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities

published 2026-10-21 18 d ago modified 2026-11-07 46 h ago also EUVD-2026-107345

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

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-2026-76478 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 19 d ago (2026-10-21)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Cisco Cisco Emergency Responder
Cisco Cisco Unified Communications Manager
Cisco Cisco Unified Communications Manager IM and Presence Service
Cisco Cisco Unity Connection

Classification

Weakness

CWE-284 Improper Access Control

References

Sources

CVE List CVE-2026-76478
NVD CVE-2026-76478

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary