CVE-2015-3326: Trend Micro ScanMail for Microsoft Exchange (SMEX) 10.2 before Hot Fix Build 3318 and 11.0 before Hot Fix B...

Security readout for executives and security teams

Older Trend Micro ScanMail for Microsoft Exchange web consoles generated predictable session IDs. If the console is reachable, an attacker could bypass login by guessing valid sessions. This matters most where legacy SMEX versions remain deployed or admin consoles are exposed beyond trusted networks. Exposure is limited to organizations still running the named legacy SMEX builds, especially if the SMEX web console is reachable from untrusted networks. Systems already updated beyond the listed hot fix builds are not indicated as affected by the provided sources. Treat as priority for legacy Exchange security infrastructure. Business urgency is highest if affected SMEX consoles are internet-facing or broadly reachable. If SMEX is retired or patched, track as a historical exposure item. Mitigation focus: Apply Trend Micro SMEX 10.2 Hot Fix Build 3318 or later if on 10.2.; Apply Trend Micro SMEX 11.0 Hot Fix Build 4180 or later if on 11.0.; Restrict SMEX web console access to trusted administrative networks or VPN..

Prepared

Jun 13, 2026, 22:39 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.