Privileged code execution via ikestubd out-of-bounds write
Published Jul 2, 2026 · Updated Jul 2, 2026
Out-of-bounds write in WatchGuard Fireware OS allows remote authenticated users to execute code through the Management Web UI. The ikestubd process writes crafted request data beyond a buffer, but WatchGuard has not disclosed the affected handler or field. Exploitation requires a privileged account and affects 12.1 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2.
Summary
What happened
Out-of-bounds write in WatchGuard Fireware OS allows remote authenticated users to execute code through the Management Web UI. The ikestubd process writes crafted request data beyond a buffer, but WatchGuard has not disclosed the affected handler or field. Exploitation requires a privileged account and affects 12.1 through 12.12, 12.5 through 12.5.18, and 2025.1 through 2026.2.
The record
- CVE
- CVE-2026-13383
- Published
- Jul 2, 2026
- Updated
- Jul 2, 2026
- Vendor
- WatchGuard Technologies, Inc.
- Product
- Fireware OS
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jul 2, 2026CVE publishedPublication date reported by the CVE source.
- Jul 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=12.1 <=12.12
- Affected versionversion=12.5 <=12.5.18
- Affected versionversion=2025.1 <=2026.2
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.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo