At a glance: Cisco patches a critical vulnerability in Unified Communications Manager and two additional security flaws in other products.
Cisco has released security updates for three products, including a critical flaw in Unified Communications Manager. The remediation is recommended to CISOs for timely evaluation and patch management.
Cisco has provided patches for vulnerabilities in three product lines. The vulnerability rated as critical affects Unified Communications Manager, a central telephony and unified communications system in enterprise environments. The available source does not contain further details on CVE number, CVSS score, or attack vector.
Unified Communications Manager is typically integrated in larger organizations as critical communication infrastructure. A compromise could impact internal networks and business continuity. CISOs should identify affected versions in their inventories and set patch priorities accordingly.
Cisco recommends deploying available security updates promptly. Details on versions, availability, and possible workarounds can be found in the Cisco Security Advisory. Even though this notice lacks details on the other two products, affected environments should evaluate all three.
Source: www.heise.de · Published June 4, 2026
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