High 8.8Published Oct 21, 2026

CVE-2026-76478Cisco Unified Communications Products Hardening Release: October 2026 - Improper Access Control Vulnerabilities

Updated under an hour ago (Oct 27, 2026, 8:00 AM ET)

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It affects Cisco Emergency Responder and 3 other products. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.15%, higher than 4% of scored CVEs.

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Exploited in the last 30 days

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-2026-76478 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.15% (percentile 4)
Assigned by: cisco
NVD analysis: Awaiting Analysis
Record last updated: Oct 22, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

Cisco Cisco Emergency Responder cisco:emergency_responder (from the name)	14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 15SU1a; and 6 more ranges	CNA record
Cisco Cisco Unified Communications Manager cisco:unified_communications_manager (from the name)	14; 14SU1; 14SU2; 14SU3; 15; 15SU1; 14SU4; 14SU4a; and 15 more ranges	CNA record
Cisco Cisco Unified Communications Manager IM and Presence Service cisco:unified_communications_manager_im_and_presence_service (from the name)	14; 14SU1; 14SU2; 14SU2a; 14SU3; 15; 15SU1; 14SU4; and 5 more ranges	CNA record
Cisco Cisco Unity Connection cisco:unity_connection (from the name)	14; 14SU1; 14SU2; 14SU3; 14SU3a; 15; 15SU1; 14SU4; and 5 more ranges	CNA record

References

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-voice-hardening-twgbH9e3

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.