A version-rollback vulnerability has been discovered by a cybersecurity researcher that allows a fully patched Windows machine to be downgraded to older version, allowing the exploitation of previously patched zero-days and vulnerabilities.
Alon Leviev unveiled his findings at Black Hat USA 2024 and DEF CON 32 (2024) as a tool named Windows Downdate. Leviev started their journey with the aim of discovering a version-rollback exploit using Windows Update as a starting point. It turned out Windows Update had a significant flaw that allowed for a full takeover of the update process, including downgrading Windows versions.
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Source: MSN News
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