Lead · Vulnerabilities
BeyondTrust zero-day joins KEV on a Friday, having been exploited since late August
CISA added CVE-2026-102764 and a 5.4-rated Fortinet path traversal to the known-exploited catalogue on the same day; one is a China-nexus espionage access route, the other delivers a memory-resident implant, and neither was going to be caught by sorting a spreadsheet on severity.
BeyondTrust warned customers on Thursday to patch a critical flaw in Remote Support that has been exploited in zero-day attacks since late August; the vulnerability was disclosed on 15 October and CISA put it in KEV on the 16th. It is CVE-2026-102764, CVSS 9.3, described by CISA as an authentication bypass by spoofing that allows a remote attacker to perform file operations on the appliance, and by Mandiant as enabling arbitrary file upload. The group is tracked as Armory Castle, previously UNC5221 or Warp Panda, which took over Remote Support servers, deployed custom tools, and deleted logs and artefacts on the way out. The tidy ones are always the worry: the loud ones encrypt you, the quiet ones read your support sessions for seven weeks.
On the same KEV day, CVE-2025-61624: a Fortinet path traversal affecting FortiOS, FortiPAM, FortiProxy and FortiSwitchManager, exploitable by an authenticated attacker with an admin profile and read-write permissions to write or delete arbitrary files via specific CLI commands. Score, 5.4. Use, delivering a previously unreported memory-resident ARM64 implant called PEERSTITCH that bypasses checks on tagged VPN sessions. If your patch queue is sorted by CVSS descending, that one is somewhere below a theme bug, and it is on the wire today.
Dark Reading makes the pattern explicit: Ivanti, Cisco and Palo Alto Networks all had edge-device vulnerabilities come under fire this week, and BeyondTrust joins the group. These are the boxes we bought specifically because they were allowed to reach everything, and we are now surprised, annually, that an attacker who reaches them also reaches everything. That is not a sophisticated campaign. That is an architecture working as designed, for somebody else.
Why it mattersIf you run Remote Support or FortiOS-family kit, the question this weekend is not 'are we patched' but 'what happened between late August and now', and the logs on the appliance are exactly what the actor was deleting.
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- 4AlienVault OTXARMORY CASTLE Exploits BeyondTrust — On October 15,…
- 5RSSBeyondTrust patches zero-day exploited in attacks s…