CVE-2026-76474 in Emergency Responder
Summary
by MITRE • 10/21/2026
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-2026-76474 are related to issues concerning improper authentication that are grouped under the Common Weakness Enumeration (CWE) Class CWE-287.
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Analysis
by VulDB Data Team • 10/21/2026
Cisco has released software hardening updates for a suite of Unified Communications and collaboration products, including Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager, its IM & Presence Service variant, the Session Management Edition, and Cisco Unity Connection. These releases are the result of a comprehensive internal security review aimed at addressing multiple internally discovered vulnerabilities that could compromise system integrity if left unpatched. The primary focus of this remediation effort is on authentication mechanisms within these critical communication platforms, which serve as the backbone for enterprise voice, video, and messaging services.
The specific vulnerability tracked under CVE-2026-76474 falls squarely into the category of improper authentication, classified by the Common Weakness Enumeration standard as CWE-287. This weakness occurs when a software product does not adequately verify the identity of an actor before granting access to sensitive resources or functions. In the context of Cisco Unified Communications systems, such flaws could potentially allow unauthorized users to bypass login requirements, manipulate session states, or access administrative interfaces without valid credentials. The lack of robust authentication checks creates a pathway for attackers to perform actions that should be restricted to authenticated and authorized personnel only.
From an operational perspective, vulnerabilities in these platforms pose significant risks to organizational security posture. Since Unified Communications systems often handle sensitive corporate communications and integrate with broader IT infrastructure, unauthorized access could lead to data exfiltration, service disruption, or lateral movement within the network. Attackers exploiting improper authentication flaws might gain persistent access to communication channels, enabling them to intercept calls, modify voicemail messages, or disrupt critical business operations. The impact extends beyond mere confidentiality breaches; it also affects availability and integrity of enterprise communications infrastructure.
The ATT&CK framework categorizes such behaviors under techniques related to Initial Access and Credential Access, specifically those involving valid accounts used without proper authentication verification. By addressing CWE-287 issues, Cisco aims to close gaps that could be leveraged for initial compromise or privilege escalation within the communication ecosystem. The hardening releases likely include enhanced validation logic, stricter session management protocols, and improved error handling to prevent attackers from exploiting ambiguous responses during authentication attempts.
Organizations utilizing any of the affected products should prioritize applying these software updates immediately to mitigate potential exploitation risks. It is advisable to verify that all components within the Unified Communications environment are updated consistently to avoid version mismatches that could leave residual vulnerabilities. Additionally, administrators should review access logs for any suspicious activity indicative of authentication bypass attempts prior to patching, as such indicators might suggest active probing or exploitation efforts against unpatched systems. Regular security audits and adherence to least-privilege principles further strengthen defenses against this class of weaknesses.