Root code execution via firewalld out-of-bounds write
Published Mar 3, 2026 · Updated Mar 3, 2026
Out-of-bounds write in WatchGuard Fireware OS allows remote authenticated users to execute arbitrary code as root through its management interface. The firewalld process performs the out-of-bounds write, but WatchGuard has not disclosed the triggering request field or faulty memory operation. Exploitation requires privileged administrator authentication and management-interface exposure, and successful exploitation grants root-level control.
Summary
What happened
Out-of-bounds write in WatchGuard Fireware OS allows remote authenticated users to execute arbitrary code as root through its management interface. The firewalld process performs the out-of-bounds write, but WatchGuard has not disclosed the triggering request field or faulty memory operation. Exploitation requires privileged administrator authentication and management-interface exposure, and successful exploitation grants root-level control.
The record
- CVE
- CVE-2026-3342
- Published
- Mar 3, 2026
- Updated
- Mar 3, 2026
- Vendor
- WatchGuard Technologies
- Product
- Fireware OS
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Mar 3, 2026CVE publishedPublication date reported by the CVE source.
- Mar 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=11.9 <=11.12.4+541730
- Affected versionversion=12.0 <=12.11.7
- Affected versionversion=12.5 <=12.5.16
- Affected versionversion=2025.1 <=2026.1.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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