CVE-2026-78174

Critical

Description

WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log. A low-privileged Dimension Administrator can retrieve this log and extract a Super Administrator's session token while that administrator is logged in, enabling account takeover.

SeverityCritical

CVSS9.3

Exploit probability—

ProductDimension

PublishedAug 28, 2026

First seenAug 28, 2026

Weakness typeCWE-200Sensitive information exposure CWE-269Improper privilege management CWE-532CWE-532

How to fix

Update

WatchGuard Dimension2.3.1 or later

Vendor advisories

psirt.watchguard.com/CVE-2026-78174

Affected products

Product	Affected versions	Fixed in
WatchGuard Dimension	2.0 ≤ v < 2.3.1	2.3.1

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