CISA issued an alert on exploitation of critical zero-day vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway, noting confirmed malicious activity involving at least some of them. The alert references Citrix bulletins for CVE-2026-107406, CVE-2026-88779 and CVE-2026-88771 through CVE-2026-88778. Because NetScaler updates can be …
A multinational advisory (CISA, NSA, FBI, AIVD, MIVD, NCSC-UK and others) warns that the Russian state-supported APT LAUNDRY BEAR (aka Void Blizzard, TA488) has compromised Western government, defense industrial base and NGO organizations running Zimbra Collaboration Suite (ZCS) since at least July 2025. The campaign uses a view-based XSS…
The FBI has publicly called on remaining ShinyHunters members to surrender. Cyber division assistant director Brett Leatherman released a video thanking Dutch police for arresting a 24-year-old in Amsterdam. The FBI calls him "one of the alleged leaders" of the group, while Dutch police say only that he played a role. He is also suspected…
Mandiant and GTIG attribute exploitation of the critical BeyondTrust Remote Support zero-day CVE-2026-102764 to Armory Castle (formerly tracked as UNC5221), a likely Chinese government-backed espionage group. BeyondTrust dates the first known exploitation to Aug. 29 and says it detected and contained the activity Sept. 28. Only a small nu…
TrendAI™ (Trend Micro) published its H1 2026 APT Activity Roundup on July 29, 2026. It finds nation-state actors used AI in more stages of the intrusion lifecycle than in any prior half-year the company has tracked. China-aligned actors used generative AI to refine exploits and iteratively build malware through "vibe coding", and one AI a…
Ivanti released its October 2026 security update on 13 October 2026. It fixes the actively exploited Connect Secure zero-day CVE-2026-104935, a spoofing-based authentication bypass that lets remote, unauthenticated attackers execute arbitrary commands (cert.ssi.gouv.fr, darkwebinformer.com). The flaw was discovered by Volexity, which trac…
Dutch authorities arrested a 24-year-old, reportedly Pepijn van der Stap (alias "Umbreon"), around Sept. 16, 2026 on suspicion of aiding data thefts and extortions by ShinyHunters. Van der Stap was previously convicted in 2023 for data theft and extortion. Days after the arrest, remaining ShinyHunters members escalated, breaching the FBI …
This SentinelOne weekly roundup covers law enforcement wins and two major breaches. A federal court sentenced former U.S. Army soldier Cameron John Wagenius to 70 months for attacks on technology and telecom firms, and former U.S. Air Force members Chijioke Timothy Odimegwu and Harafat Mogaji received a combined 189 months for business em…
The PHP security team released emergency fixes on October 21, 2026 for two critical core flaws, CVE-2026-109618 and CVE-2026-109619, nicknamed PHP2Shell. Both are rated CVSS v4.0 9.2 and allow unauthenticated remote code execution (RCE) as the web worker account. They can also expose process memory that may hold credentials and API keys (…