CVE-2026-78174 WatchGuard Dimension Session Hijack via Exposed Session Tokens in Diagnostic Logs
A low-privileged administrator can steal Super Administrator session tokens from diagnostic logs, leading to account takeover and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-78174?
CVE-2026-78174 is a critical vulnerability in WatchGuard Dimension, published on 27 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-78174?
How do I fix CVE-2026-78174?
No fix has been published for CVE-2026-78174 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78174 being exploited?
There is no known exploitation of CVE-2026-78174 in the wild and no public exploit code.
Sources
Also known as GHSA-8xpm-cmp9-mq75.