Hackers part of APT28, a state-backed threat group linked to Russia's military intelligence service (GRU), are exploiting a Zimbra Collaboration...

A Russian state-linked threat actor has launched a targeted cyberattack against a Ukrainian government agency, exploiting a cross-site scripting (XSS)...

A Russian state-linked threat actor has launched a targeted cyberattack against a Ukrainian government agency, exploiting a cross-site scripting (XSS)...

CISA has ordered U.S. government agencies to secure their servers against an actively exploited vulnerability in the Zimbra Collaboration Suite (ZCS)....

CISA has ordered U.S. government agencies to secure their servers against an actively exploited vulnerability in the Zimbra Collaboration Suite (ZCS)....

Russian APT exploits a critical XSS flaw in Zimbra, tracked as CVE-2025-66376, running scripts via HTML emails to target users in Ukraine....

Russian state-sponsored hackers have been linked to an ongoing Signal and WhatsApp phishing campaign targeting government officials, military...

Russian state-sponsored hackers have been linked to an ongoing Signal and WhatsApp phishing campaign targeting government officials, military...

The FBI has issued a public service announcement warning that Russian intelligence-linked threat actors are actively targeting users of encrypted...

The FBI has issued a public service announcement warning that Russian intelligence-linked threat actors are actively targeting users of encrypted...