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#3 The Hacker News general July 30, 2026 at 07:40 UTC

Russian Hackers Exploit Microsoft OWA Flaw to Keep Mailbox Access After Credential Rotation

By [email protected] (The Hacker News)

AI Summary

The Russian group Laundry Bear, previously linked to Zimbra exploitation, began exploiting a Microsoft OWA vulnerability on July 22, 2026, maintaining persistent mailbox access even after victim organizations rotated credentials. Targeted sectors include US and European governments, telecommunications, financial services, hospitality, and aerospace.

Read full article → https://thehackernews.com/2026/07/russian-hackers-…

Relevance score: 90.0/100

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