Firebox and Fireware OS
CVE-2026-78617: WatchGuard Dimension Web UI Authentication Brute-Force Due to Missing Rate Limiting
WatchGuard Dimension's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts.
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's web login endpoint does not enforce effective rate-limiting or account lockout by default allowing a remote attacker to perform automated password guessing against user accounts. If the account lockout setting is enabled, brute-force attempts are blocked after a defined number of failed attempts, but this setting is not enabled by default.
Am I affected?
The default Dimension configuration does not enforce account lockouts for incorrect password retries.
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.