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WatchGuard Dimension CVE-2026-78498

| EUVDEUVD-2026-67356 MEDIUM
Server-Side Request Forgery (SSRF) (CWE-918)
2026-08-27 WatchGuard GHSA-27h4-xhmx-rq4q
SSRF Watchguard Dimension
5.1
CVSS 4.0 · Vendor: WatchGuard
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Severity by source

Vendor (WatchGuard) PRIMARY
5.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.1 MEDIUM

Network-reachable but high privileges required; scope changes to adjacent systems with low confidentiality impact only via service enumeration.

3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N

Primary rating from Vendor (WatchGuard).

CVSS VectorVendor: WatchGuard

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

2
Patch available
Aug 28, 2026 - 04:16 EUVD
Analysis Generated
Aug 28, 2026 - 02:47 vuln.today

DescriptionCVE.org

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.

AnalysisAI

Server-side request forgery in WatchGuard Dimension's Email Server Test configuration feature enables authenticated privileged attackers to probe and enumerate network services on adjacent network segments. The vulnerability stems from insufficient validation of server-initiated outbound requests, allowing the Dimension management platform to be weaponized as a network scanning proxy. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Vulnerability AssessmentAI

Exploitation Exploitation requires a fully authenticated account with high (privileged/administrator-level) access to the WatchGuard Dimension management interface, as confirmed by the CVSS 4.0 PR:H metric. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 5.1 (Medium) accurately reflects the constrained real-world risk profile of this vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary remediation is to apply the vendor-supplied patch referenced in the WatchGuard PSIRT advisory at https://psirt.watchguard.com/CVE-2026-78498; however, an exact fixed version number is not confirmed in the currently available data and must be obtained directly from that advisory. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-78498 vulnerability details – vuln.today
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