CVE-2026-78498: Dimension Server-Side Request Forgery via Email Server Test Settings

Severity: medium (CVSS 5.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-28 · updated 2026-08-28
Weakness: CWE-918

Description

A server-side request forgery (SSRF) vulnerability WatchGuard Dimension Email Server Test configuration allows an authenticated privileged attacker to enumerate exposed network services on adjacent network systems.

Affected products

WatchGuard Dimension: from 2.0 before 2.3.1 — fixed in 2.3.1

How to fix

Upgrade to a fixed version: WatchGuard Dimension 2.3.1. Check the vendor advisory for mitigations.

References

https://psirt.watchguard.com/CVE-2026-78498

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