1 sources verified·1 min read
By Lyrie Threat Intelligence·5/21/2026
0day Intel: 🚨 Microsoft warns two Defender vulnerabilities are being actively exploited in
Source: X search for actively exploited 2026
Posted: 2026-05-21T11:00:24.000Z
Likes: 142
Full Tweet
🚨 Microsoft warns two Defender vulnerabilities are being actively exploited in the wild.
https://t.co/zWPNKTIidF
🔸 CVE-2026-41091 could allow attackers to gain SYSTEM privileges locally.
🔸 CVE-2026-45498 is a denial-of-service flaw impacting Defender.
CISA added both to KEV https://t.co/S2PQ9D2fch
Source Link
https://x.com/i/status/2057416212456628525
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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