CVE-2026-76474: Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentication Vulnerabilities
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.5%
Up from 0.4% on .
EPSS score, percentile 41 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 14
- 14SU1
- 14SU2
- 14SU3
- 14SU3a
- 15
and 42 more in the table below
Source: CISA KEV 2026.10.28, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 14 |
| Affected | 14SU1 |
| Affected | 14SU2 |
| Affected | 14SU3 |
| Affected | 14SU3a |
| Affected | 15 |
| Affected | 15SU1 |
| Affected | 15SU1a |
| Affected | 14SU4 |
| Affected | 15SU2 |
| Affected | 15SU3 |
| Affected | 14SU5 |
Versions not listed are: unknown.
And 2 more version entries in the CVE record.
| Status | Versions |
|---|---|
| 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 |
Versions not listed are: unknown.
And 11 more version entries in the CVE record.
| Status | Versions |
|---|---|
| Affected | 14 |
| Affected | 14SU1 |
| Affected | 14SU2 |
| Affected | 14SU2a |
| Affected | 14SU3 |
| Affected | 15 |
| Affected | 15SU1 |
| Affected | 14SU4 |
| Affected | 15SU2 |
| Affected | 15SU3 |
| Affected | 14SU5 |
| Affected | 15SU4 |
Versions not listed are: unknown.
And 1 more version entries in the CVE record.
| Status | Versions |
|---|---|
| Affected | 14 |
| Affected | 14SU1 |
| Affected | 14SU2 |
| Affected | 14SU3 |
| Affected | 14SU3a |
| Affected | 15 |
| Affected | 15SU1 |
| Affected | 14SU4 |
| Affected | 15SU2 |
| Affected | 15SU3 |
| Affected | 14SU5 |
| Affected | 15SU4 |
Versions not listed are: unknown.
And 1 more version entries in the CVE record.
Source: CVE List, as of . About the data.
About this vulnerability
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 Un…
Summary: CVE record, as of .
- CISA has not added CVE-2026-76474 to its Known Exploited Vulnerabilities (KEV) catalog, as of 28 Oct 2026.
- The CVE record was published on 21 Oct 2026.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.5% (percentile 41), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact total.
Source: CISA KEV 2026.10.28, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.
Description
Cisco Unified Communications Products Hardening Release: October 2026 - Improper Authentication Vulnerabilities
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.
Source: CVE List, as of . About the data.
Weakness
CWE-287
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
1
Known exploited Cisco vulnerabilities
- CVE-2026-76519: Cisco Secure Email Gateway Relative Path Traversal Vulnerability
- CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
- CVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
- CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability
- CVE-2026-20079: Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability