Session Token Exposure in WatchGuard Dimension Web Interface
CVE-2026-78174

9.3CRITICAL

Key Information:

Vendor

Watchguard

Status
Dimension
Vendor
CVE Published:
27 August 2026

Badges

👾 Exploit Exists

What is CVE-2026-78174?

WatchGuard Dimension retains unredacted session identifiers for logged-in users within its web UI diagnostic log. This security oversight allows a low-privileged Dimension Administrator to access sensitive logs and extract a Super Administrator's session token while they are actively logged in. By exploiting this vulnerability, attackers can potentially conduct account takeover, posing a significant risk to user accounts and sensitive data.

Affected Version(s)

Dimension 2.0 < 2.3.1

References

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

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Simone Paganessi (https://www.linkedin.com/in/simonepaganessi)
.