ACTIVELY EXPLOITED3 sources verified·1 min read
By Lyrie Threat Intelligence·5/15/2026
CVE-2026-42897 added to CISA KEV: Microsoft Microsoft
Status: ✅ Confirmed exploited in the wild
Date added: 2026-05-15
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.
Due date: 2026-05-29
Why this matters
Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.
Sources
Lyrie Verdict
Lyrie's autonomous detection layer catches active exploitation primitives at machine speed — closing the gap between disclosure and weaponization that traditional defense simply can't cover.
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