0patch fix for Windows Server telephony vulnerability CVE-2026-20931

Posted on 2026-04-25 by guenni

WindowsWindows Server contains a telephony vulnerability (CVE-2026-20931) that allows for privilege escalation. Microsoft patched the vulnerability in January 2026, but this has caused issues. ACROS Security recently released a 0patch micropatch to address this telephony vulnerability, CVE-2026-20931, for Windows Server systems without ESU licenses. Read details within my German blog post [use build-in translation to switch language].

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