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critical threat

TA488 Exploits Zimbra Mailservers with Half-Click Vulnerability CVE-2025-66376

Russia-aligned threat actor TA488 (Void Blizzard, Laundry Bear) exploited CVE-2025-66376, a critical XSS vulnerability in Zimbra Collaboration Suite webmail, for at least five months in 2025 via crafted emails to gain persistent access, exfiltrate user credentials, 2FA codes, and bulk emails from Ukrainian government and US defense industrial base targets.

PoC Zimbra Collaboration Suite +10 TA488 +2 espionage xss zimbra apt state-sponsored half-click cve-2025-66376
2r 9t 3c 7i updated
high advisory

Microsoft Security Updates — July 2026

Roundup of Microsoft security advisories published in July 2026.

PoC PowerShell +516 roundup
10c 227i updated
medium advisory

Defense Evasion via Exchange DLP Policy Removal

Attackers may remove or modify Exchange Data Loss Prevention (DLP) policies in Microsoft 365 to evade detection and exfiltrate sensitive data without triggering alerts.

Microsoft 365 +1 o365 dlp defense_evasion data_exfiltration
2r 1t