Cisco security advisory (AV26-547)

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        <div><p><strong>Serial number: </strong>AV26-547<br /><strong>Date:</strong> June 3, 2026</p>

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.

The Cyber Centre encourages users and administrators to review the provided web links and apply the necessary updates.

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Article Link: Cisco security advisory (AV26-547) - Canadian Centre for Cyber Security