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ttps_attack:T1570 × latest_source_host:gbhackers.com × limpar

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gbhackers.com · critical

Zimbra Collaboration Suite zero-click command injection CVE-2026-73570 exploited to take over email servers

Microsoft Threat Intelligence reports active exploitation of CVE-2026-73570, a command injection flaw in Zimbra Collaboration Suite that allows unauthenticated, zero-click compromise of internet-facing email servers. Attackers deployed webshells, escalated privileges, harvested authentication secrets and staged mailbox data across organiz…

gbhackers.com · high

Gentlemen ransomware uses vulnerable Lenovo and Safetica drivers (BYOVD) to kill security software before encryption

Acronis Threat Research Unit found that the Gentlemen ransomware operation is using the BYOVD (bring your own vulnerable driver) technique with legitimate Lenovo and Safetica kernel drivers to terminate endpoint security software before encrypting files. Two custom dropper samples were recovered from a recent incident. They install the dr…