Quick answers
- Is CVE-2026-78103 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78103 being exploited in the wild.
- How severe is CVE-2026-78103?
- Informational severity, with a CVSS score of 5.1, published 28 August 2026.
- Which products and versions are affected?
- Watchguard Dimension 2.0 to 2.3.0.
- Is there a fix for CVE-2026-78103?
- A patch was published on 2026-08-27: Fixed in Dimension 2.3.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-78103 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-78103?
- 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
This is an improper enforcement of behavioral workflow vulnerability (CWE-841) where the client-side lock/unlock UI control for configuration changes is not validated on the server side. An authenticated administrator with read-write privileges can submit configuration changes directly to the server endpoint without completing the required UI unlock step, bypassing the intended concurrent-edit protection workflow. The attack requires valid administrative credentials and network access to the management endpoint. An attacker can overwrite configuration changes being made by another concurrent administrator session, potentially causing configuration inconsistencies or enabling malicious settings. The vulnerability was patched in Dimension 2.3.1.
Affected products
- WatchGuard Dimension 2.0 to 2.3.0
Timeline
- 2026-08-27: disclosed
- 2026-08-27: patched: Fixed in Dimension 2.3.1