Firebox and Fireware OS
CVE-2026-78174: WatchGuard Dimension Session Hijack via Exposed Session Tokens in Diagnostic Logs
WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Dimension 2.0 | 2.3.1 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log. A low-privileged Dimension Administrator can retrieve this log and extract a Super Administrator's session token while that administrator is logged in, enabling account takeover.
Exploitation
WatchGuard is not aware of any exploitation of this vulnerability in the wild.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.