Out-of-Bounds Write Vulnerability in WatchGuard Fireware OS
CVE-2026-3342

8.6HIGH

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
3 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-3342?

An Out-of-bounds Write vulnerability exists in WatchGuard Fireware OS that could be exploited by an authenticated privileged administrator. This flaw enables the potential for arbitrary code execution with root permissions via an exposed management interface, posing significant security risks to affected systems.

Affected Version(s)

Fireware OS 11.9 <= 11.12.4+541730

Fireware OS 12.0 <= 12.11.7

Fireware OS 12.5 <= 12.5.16

References

https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-...

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
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

btaol
.