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#1 BleepingComputer general June 30, 2026 at 08:53 UTC

CISA: Windows BlueHammer flaw now exploited by ransomware gangs

By Sergiu Gatlan

AI Summary

CISA confirmed ransomware gangs are actively exploiting CVE-2026-33825, a Microsoft Defender privilege escalation vulnerability dubbed BlueHammer, which had previously been used as a zero-day before patches were released. The addition to CISA's Known Exploited Vulnerabilities catalog obligates federal agencies to patch and signals urgent priority for enterprise defenders running Windows endpoints.

Read full article → https://www.bleepingcomputer.com/news/security/cis…

Relevance score: 88.0/100

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