KB5123287: CVEs fixed (Windows update (KB))

KB5123287 fixes 1 tracked CVE. Affected systems and fixed versions.

• CVE-2026-66302 CRITICAL 9.8 DOWNGRADE DOWNGRADE External control of file name or path in Skype for Business allows an unauthorized attacker to execute code ov

Applies to

• Skype for Business Server Subscription Edition CU1 · fixed in 7.0.2046.879

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