Quick answers
- Is CVE-2026-78498 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78498 being exploited in the wild.
- How severe is CVE-2026-78498?
- 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-2026-78498?
- A patch was published on 2026-08-27: Fixed in version 2.3.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-78498 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78498?
- 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
A server-side request forgery (SSRF) vulnerability exists in WatchGuard Dimension's Email Server Test configuration feature. An authenticated user with administrative privileges can craft requests that force the Dimension server to perform HTTP requests to arbitrary network addresses, allowing enumeration of services on adjacent network systems. The vulnerability requires authentication and administrative privileges to exploit. An attacker can discover exposed internal network services and their versions, which can be used for further network reconnaissance or targeted attacks. The issue is fixed in Dimension version 2.3.1.
Affected products
- WatchGuard Dimension 2.0 to 2.3.0
Timeline
- 2026-08-27: disclosed
- 2026-08-27: patched: Fixed in version 2.3.1