Vulnerability · Published Oct 21, 2026 · Assigned by cisco
CVE-2026-76473Cisco Unified Communications Products Hardening Release: October 2026 - Improper control of a resource through its lifetime.
Critical 9.8
In plain English
A critical-severity injection in Cisco Emergency Responder from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Official description
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-2026-76473 are related to issues concerning improper neutralization of special elements in output used by a downstream component that are grouped under the Common Weakness Enumeration (CWE) Class CWE-74.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Emergency Responder | 1414SU114SU214SU314SU3a1515SU115SU1a |
| Cisco | Cisco Unified Communications Manager | 1414SU114SU214SU31515SU114SU414SU4a |
| Cisco | Cisco Unified Communications Manager IM and Presence Service | 1414SU114SU214SU2a14SU31515SU114SU4 |
| Cisco | Cisco Unity Connection | 1414SU114SU214SU314SU3a1515SU114SU4 |
Weakness: CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H