CVE-2026-76476
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
Cisco conducted an internal security review of Emergency Responder, Prime Collaboration Deployment, Unified Communications Manager, Unified CM IM & Presence, Unified CM SME, and Unity Connection, resulting in hardening releases that address multiple internally discovered vulnerabilities related to improper input validation (CWE-20).
Risk Assessment
Improper input validation may be exploited by an attacker to disrupt or compromise affected communication systems, impacting availability and security of UC infrastructure.
Recommendation
Apply the latest Cisco hardening releases for the listed products as described in the Cisco security advisory.
Other vulnerabilities in Cisco Unified Communications
See all- CVE-2026-76475Critical
A vulnerability in Cisco products (Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME, Unity Connection) related to improper neutralization of input during web page generation (CWE-79, cross-site scripting). It was discovered during an internal security review and fixed in hardening releases.
- CVE-2026-76474Critical
Cisco conducted an internal security review of Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME, and Unity Connection, resulting in hardening releases. CVE-2026-76474 covers internally discovered vulnerabilities related to improper authentication (CWE-287).
- CVE-2026-76473Critical
A vulnerability in Cisco products (Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME, Unity Connection) related to improper control of a resource through its lifetime (CWE-74). It was discovered during an internal security review and fixed in hardening releases.
- CVE-2026-76479High
Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified CM IM & Presence Service, Cisco Unified CM Session Management Edition, and Cisco Unity Connection contain multiple vulnerabilities related to improper limitation of a pathname to a restricted directory (CWE-22). Cisco has released software hardening updates.
- CVE-2026-76478High
Cisco conducted an internal security review of Emergency Responder, Prime Collaboration Deployment, Unified CM, Unified CM IM&P, Unified CM SME, and Unity Connection, resulting in hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities relate to improper access control issues grouped under CWE-284.
Original NVD description (English source)
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-2026-76476 are related to issues concerning improper input validation that are grouped under the Common Weakness Enumeration (CWE) Class CWE-20.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS