CVE-2026-13383: CWE-787 Out-of-bounds Write in WatchGuard Fireware OS
CVE-2026-13383 is an out-of-bounds write vulnerability in the ikestubd process of WatchGuard Fireware OS. It affects versions 12.1 through 12.12 and 2025.1 through 2026.2. An authenticated privileged user can exploit this flaw via specially crafted requests to the Management Web UI to execute arbitrary code. The vulnerability has a high severity with a CVSS score of 8.6. No official patch or remediation guidance has been provided yet by the vendor.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-13383) involves an out-of-bounds write in the ikestubd process of WatchGuard Fireware OS. It allows an authenticated user with elevated privileges to execute arbitrary code by sending specially crafted requests to the Management Web UI. The affected versions include Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. The CVSS 4.0 score is 8.6, indicating a high severity vulnerability. There is currently no vendor advisory or patch available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation could allow an authenticated privileged user to execute arbitrary code on the affected system, potentially leading to full system compromise or disruption of firewall operations. The vulnerability requires privileged authentication, limiting exposure to authorized users only.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict privileged access to the Management Web UI to trusted administrators only and monitor for suspicious activity related to ikestubd process interactions.
CVE-2026-13383: CWE-787 Out-of-bounds Write in WatchGuard Fireware OS
Description
CVE-2026-13383 is an out-of-bounds write vulnerability in the ikestubd process of WatchGuard Fireware OS. It affects versions 12.1 through 12.12 and 2025.1 through 2026.2. An authenticated privileged user can exploit this flaw via specially crafted requests to the Management Web UI to execute arbitrary code. The vulnerability has a high severity with a CVSS score of 8.6. No official patch or remediation guidance has been provided yet by the vendor.
CVSS v4.0
Score 8.6high
Affected software
pkg:github/watchguard/fireware-osRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-13383) involves an out-of-bounds write in the ikestubd process of WatchGuard Fireware OS. It allows an authenticated user with elevated privileges to execute arbitrary code by sending specially crafted requests to the Management Web UI. The affected versions include Fireware OS 12.1 up to and including 12.12 and 2025.1 up to and including 2026.2. The CVSS 4.0 score is 8.6, indicating a high severity vulnerability. There is currently no vendor advisory or patch available, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation could allow an authenticated privileged user to execute arbitrary code on the affected system, potentially leading to full system compromise or disruption of firewall operations. The vulnerability requires privileged authentication, limiting exposure to authorized users only.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict privileged access to the Management Web UI to trusted administrators only and monitor for suspicious activity related to ikestubd process interactions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WatchGuard
- Date Reserved
- 2026-06-25T22:44:09.033Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a46f28127e9c797194fffea
Added to database: 07/02/2026, 23:21:37 UTC
Last enriched: 07/02/2026, 23:36:42 UTC
Last updated: 07/03/2026, 00:28:34 UTC
Views: 5
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