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CVE-2026-76473

Cisco Unified Communications Products Hardening Release: October 2026 - Improper control of a resource through its lifetime.

Critical9.8EPSS 0.49%
Published
Updated
Reserved
Assigned by
cisco

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.

Timeline

  1. ID reserved

    By cisco

  2. · 2 months later

    Published

  3. · 17 days later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-76473, by who scored it
Scored byCVSSScoreVector
ciscoCNA (assigner)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Awaiting Analysis3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.49% · top 58% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • Cisco · Cisco Emergency Responder

    • affected 14
    • affected 14SU1
    • affected 14SU2
    • affected 14SU3
    • affected 14SU3a
    • affected 15
    • affected 15SU1
    • affected 15SU1a
    • affected 14SU4
    • affected 15SU2
    • affected 15SU3
    • affected 14SU5
    • affected 15SU4
    • affected 14SU6

  • Cisco · Cisco Unified Communications Manager

    • affected 14
    • affected 14SU1
    • affected 14SU2
    • affected 14SU3
    • affected 15
    • affected 15SU1
    • affected 14SU4
    • affected 14SU4a
    • affected 15SU1a
    • affected 15SU2
    • affected 15.0.1.13010-1
    • affected 15.0.1.13011-1
    • affected 15.0.1.13012-1
    • affected 15.0.1.13013-1
    • affected 15.0.1.13014-1
    • affected 15.0.1.13015-1
    • affected 15.0.1.13016-1
    • affected 15.0.1.13017-1
    • affected 15SU3a
    • affected 14SU5
    • affected 15SU4
    • affected 15SU4a
    • affected 14SU6

  • Cisco · Cisco Unified Communications Manager IM and Presence Service

    • affected 14
    • affected 14SU1
    • affected 14SU2
    • affected 14SU2a
    • affected 14SU3
    • affected 15
    • affected 15SU1
    • affected 14SU4
    • affected 15SU2
    • affected 15SU3
    • affected 14SU5
    • affected 15SU4
    • affected 14SU6

  • Cisco · Cisco Unity Connection

    • affected 14
    • affected 14SU1
    • affected 14SU2
    • affected 14SU3
    • affected 14SU3a
    • affected 15
    • affected 15SU1
    • affected 14SU4
    • affected 15SU2
    • affected 15SU3
    • affected 14SU5
    • affected 15SU4
    • affected 14SU6

What to do

Exploitation: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .