CVE-2026-20931

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

• microsoft windows 10 1607 (< 10.0.14393.8783) • microsoft windows 10 1809 (< 10.0.17763.8276) • microsoft windows 10 21h2 (< 10.0.19044.6809) • microsoft windows 10 22h2 (< 10.0.19045.6809) • microsoft windows 11 23h2 (< 10.0.22631.6491) • microsoft windows 11 24h2 (< 10.0.26100.7623) • microsoft windows 11 25h2 (< 10.0.26200.7623) • microsoft windows server 2008 • microsoft windows server 2008 r2 • microsoft windows server 2012 • microsoft windows server 2012 r2 • microsoft windows server 2016 (< 10.0.14393.8783) • microsoft windows server 2019 (< 10.0.17763.8276) • microsoft windows server 2022 (< 10.0.20348.4648) • microsoft windows server 2022 23h2 (< 10.0.25398.2092) • microsoft windows server 2025 (< 10.0.26100.32230)