Actively exploited in the wild
Microsoft MSHTML Framework Protection Mechanism Failure Vulnerability
Microsoft - Windows · Listed in the CISA KEV since 2026-02-10. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2026-21513
HighCVSS 8.8KEVSummary
Awaria mechanizmu ochrony w ramach MSHTML umożliwia nieautoryzowanemu atakującemu ominięcie funkcji zabezpieczeń w sieci.
Risk Assessment
Organizacja może być narażona na ataki, które wykorzystują lukę do uzyskania dostępu do wrażliwych danych lub systemów.
Recommendation
Zaleca się aktualizację oprogramowania MSHTML do najnowszej wersji oraz wdrożenie dodatkowych środków zabezpieczających w celu ochrony przed nieautoryzowanym dostępem.
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Original NVD description (English source)
Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network.