High-severity RCE in widely deployed Cisco Unified Communications products that can disrupt voice infrastructure and enterprise operations.
CVE-2026-76473
Critical RCE in Cisco Unified Communications voice products
Is CVE-2026-76473 being exploited?
Not confirmed. CVE-2026-76473 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-76473?
CVE-2026-76473 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-76473?
Yes. A fix has been recorded for CVE-2026-76473. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-76473 affect?
CVE-2026-76473 affects Cisco Emergency Responder, Cisco Prime Collaboration Deployment, Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager IM & Presence (Unified CM IM&P), and 2 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-76473?
Apply Cisco hardening releases immediately; isolate and monitor affected UC servers.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution enabling full UC server compromise, voice/service disruption, and lateral movement.
Immediate action required
- affected14
- affected14SU1
- affected14SU2
- affected14SU3
- affected14SU3a
- affected15
- affected15SU1
- affected15SU1a
- affected14SU4
- affected15SU2
- affected15SU3
- affected14SU5
- affected15SU4
- affected14SU6
- affected14
- affected14SU1
- affected14SU2
- affected14SU3
- affected15
- affected15SU1
- affected14SU4
- affected14SU4a
- affected15SU1a
- affected15SU2
- affected15.0.1.13010-1
- affected15.0.1.13011-1
- affected15.0.1.13012-1
- affected15.0.1.13013-1
- affected15.0.1.13014-1
- affected15.0.1.13015-1
- affected15.0.1.13016-1
- affected15.0.1.13017-1
- affected15SU3a
- affected14SU5
- affected15SU4
- affected15SU4a
- affected14SU6
- affected14
- affected14SU1
- affected14SU2
- affected14SU2a
- affected14SU3
- affected15
- affected15SU1
- affected14SU4
- affected15SU2
- affected15SU3
- affected14SU5
- affected15SU4
- affected14SU6
- affected14
- affected14SU1
- affected14SU2
- affected14SU3
- affected14SU3a
- affected15
- affected15SU1
- affected14SU4
- affected15SU2
- affected15SU3
- affected14SU5
- affected15SU4
- affected14SU6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.