Cisco
Unified Communications Manager (CUCM)
Cisco call control and unified communications platform.
15SU4a
- Release date
- February 24, 2026
- CVE status
- 1 visible CVE
Source
Vendor Release Information
Public release notes are linked for the latest stored release.
Release history
See the latest published releases stored for this product.
| Version | Published | Notes |
|---|---|---|
| 15SU4a | 2026-02-24 | Release Notes |
Vulnerability tracking
Review curated CVEs for this product and see whether the current version is marked affected. Only CVEs with a CVSS score of 7.0 or higher and published in the last 90 days are shown.
| CVE | Severity | Published | Status | Summary |
|---|---|---|---|---|
| CVE-2026-20045 | CRITICAL (9.8) | 2026-01-21 | Current versionnot affected | A vulnerability in Cisco Unified Communications Manager (Unified CM), Cisco Unified Communications Manager Session Management Edition (Unified CM SME), Cisco Unified Communications Manager IM & Presence Service (Unified CM IM&P), Cisco Unity Connection, and Cisco Webex Calling Dedicated Instance could allow an unauthenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP requests. An attacker could exploit this vulnerability by sending a sequence of crafted HTTP requests to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root. Affected versions
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