Cybersecurity alert from the Canadian Centre for Cyber Security
Serial number: AV26-547
Date: June 3, 2026
Updated: June 25, 2026
On June 3, 2026, Cisco published security advisories to address vulnerabilities in multiple products. Included was a critical update for the following:
- Cisco Unified Communications Manager (CM) Release 14 – versions prior to 14SU6
- Cisco Unified Communications Manager (CM) Release 15 – versions prior to 15SU5 (Sep 2026) or COP
- Cisco Unified Communications Manager Session Management Edition (CM SME) release 14 – versions prior to 14SU6
- Cisco Unified Communications Manager Session Management Edition (CM SME) release 15 – versions prior to 15SU5 (Sep 2026) or COP
Cisco has indicated that a proof-of-concept exploit code is available for CVE-2026-20230.
Update 1
On June 25, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-20230 to their Known Exploited Vulnerabilities (KEV) Database.
The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.
Courtesy of Canadian Centre for Cyber Security
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