This SentinelOne weekly roundup (Week 41, 2026) covers law enforcement actions, a phishing campaign and an actively exploited vulnerability. The most urgent item is CVE-2026-21589, a critical (CVSS 9.3) unauthenticated arbitrary file access flaw in Atlassian Data Center products. Exploitation attempts began about two hours after a public …
Reportedly, the US Army, Air Force, Navy and Special Operations Command have disabled mobile advertising IDs on government-issued phones and computers. The move follows concerns that commercially available location data has been used to target American forces in the Middle East. It became public after Senator Ron Wyden released letters, h…
Troy Hunt's weekly update reports two arrests linked to the ShinyHunters cybercrime group: an individual named Pepijn in the Netherlands and another named Saif in Jordan. Hunt calls the arrests an inevitable and likely outcome. He expects more members to follow, and anticipates substantial custodial sentences given the seriousness of the …
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 …
Federal investigators examining ShinyHunters have uncovered potential links between the extortion group and executives at two ransomware negotiation firms, according to a KrebsOnSecurity report published on October 19. An executive at an unnamed U.S. consulting firm (reportedly 1,000+ employees) allegedly helped operate the group's extort…
U.S. federal investigators pursuing ShinyHunters, which recently stole sensitive personnel data from the FBI recruitment site fbijobs.gov, reportedly identified executives at two ransomware negotiation firms with unusually close ties to the group. One U.S. consulting firm executive is suspected of helping operate the now-defunct extortion…
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…