1 sources verified·1 min read
By Lyrie Threat Intelligence·5/27/2026
0day Intel: 🚨 Microsoft patched two Defender zero-days (CVE-2026-41091 & CVE-2026-45498
Source: X search for actively exploited 2026
Posted: 2026-05-21T13:50:03.000Z
Likes: 10
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🚨 Microsoft patched two Defender zero-days (CVE-2026-41091 & CVE-2026-45498) — one escalates a low-privileged attacker to SYSTEM level (local exploit, no user interaction needed), the other causes a denial-of-service. Both actively exploited; CISA added both to its KEV catalog.
Source Link
https://x.com/i/status/2057458907178565961
Lyrie Verdict
Lyrie's autonomous defense layer flags this class of exposure the moment it surfaces — no signature update required.
Validated sources
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