Quick answers
- Is CVE-2026-78174 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78174 being exploited in the wild.
- How severe is CVE-2026-78174?
- Informational severity, with a CVSS score of 9.3, published 28 August 2026.
- Which products and versions are affected?
- Watchguard Dimension 2.0 to 2.3.0.
- Is there a fix for CVE-2026-78174?
- A patch was published on 2026-08-27: Dimension 2.3.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-78174 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-78174?
- Check whether you run Watchguard Dimension at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is an information disclosure and privilege escalation issue (CWE-200, CWE-269, CWE-532) where Dimension's web UI diagnostic logs contain unredacted session identifiers for all authenticated users. An attacker with Dimension Administrator privileges (but not Super Administrator) can access these diagnostic logs through the web interface and extract active session tokens of Super Administrators. With a valid session token, the attacker can perform session hijacking (CAPEC-593) to gain unauthorized Super Administrator access without needing to compromise credentials. The vulnerability requires the attacker to have valid administrative credentials and for a Super Administrator to have an active logged-in session. The fix is to upgrade to Dimension 2.3.1 or later, which redacts session tokens from diagnostic logs.
Affected products
- WatchGuard Dimension 2.0 to 2.3.0
Timeline
- 2026-08-27: disclosed
- 2026-08-27: patched: Dimension 2.3.1 released