VulnerabilityDeferred

CVE-2026-78174

WatchGuard Dimension records unredacted session identifiers for logged-in users in its web UI diagnostic log.

CRITICAL 9.3EPSS 0.35%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 4.0: 9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.35% probability · 28th percentile
CISA KEV: Not listed
Weakness: CWE-200, CWE-269, CWE-532
Source: 5d1c2695-1a31-4499-88ae-e847036fd7e3

References

https://psirt.watchguard.com/CVE-2026-78174

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.