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CVE-2024-43491 is a critical Windows Update / Servicing Stack vulnerability affecting Windows 10 version 1507, specifically supported Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB systems. Microsoft states that a servicing stack defect introduced through updates released from March 12, 2024 through August 2024 could silently roll back previously applied security fixes for certain Optional Components to their RTM state. As a result, vulnerabilities that had already been mitigated in those optional components could become reachable again. Reported affected optional components include Internet Explorer 11, IIS/WWW Services, SMB 1.0/CIFS, MSMQ, Windows Media Player, AD LDS tools, and .NET Framework 4.6/ASP.NET 4.6-related components. Microsoft and multiple cited sources characterize the issue as a pre-authentication remote code execution condition because the rollback can re-expose previously patched RCE flaws in those components. Microsoft also stated that no exploitation of CVE-2024-43491 itself had been detected; rather, the risk derives from the servicing stack regression reintroducing exploitable states in optional components.
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No public exploit code observed for this vulnerability.
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6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Windows Update remote code execution vulnerability in the Windows 10 version 1507 servicing stack, affecting supported Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB systems; the article treats it as intertwined with exploited issues and includes it among exploited-detected CVEs.
A Microsoft Windows Update remote code execution vulnerability; Microsoft notes an 'Exploitation Detected' assessment due to a servicing stack rollback of prior fixes on Windows 10 1507, while stating no direct exploitation of CVE-2024-43491 itself has been detected.
Windows 10 v1507 servicing stack defect that rolls back previously applied security updates for optional components, re-exposing patched vulnerabilities.
A remote code execution vulnerability in Microsoft Windows Update.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.