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PatchSiren cyber security CVE debrief

CVE-2026-13050 WatchGuard CVE debrief

An Out-of-bounds Write vulnerability in WatchGuard Fireware OS networkd process could allow an authenticated privileged user to execute arbitrary code via specially crafted requests to the Management Web UI. This vulnerability affects Fireware OS 11.8 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2. The CVSS score is 8.6 with a HIGH severity. Users of WatchGuard Fireware OS 11.8 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2 should apply vendor remediation.

Vendor
WatchGuard
Product
Fireware OS
CVSS
HIGH 8.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-03
Original CVE updated
2026-08-28
Advisory published
2026-07-03
Advisory updated
2026-08-28

Who should care

Users of WatchGuard Fireware OS 11.8 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2 should apply vendor remediation. This includes operators, administrators, and security teams responsible for managing and securing WatchGuard Fireware OS deployments.

Technical summary

The vulnerability affects WatchGuard Fireware OS versions 11.8 up to and including 11.12.4_Update1, 12.0 up to and including 12.12 and 2025.1 up to and including 2026.2. The CVSS score is 8.6 with a HIGH severity. The vulnerability is an Out-of-bounds Write vulnerability in WatchGuard Fireware OS networkd process. An authenticated privileged user could execute arbitrary code via specially crafted requests to the Management Web UI.

Defensive priority

High priority due to HIGH CVSS severity and potential for arbitrary code execution.

Recommended defensive actions

  • Apply vendor remediation as soon as possible
  • Inventory and verify affected systems
  • Monitor for suspicious activity
  • Implement compensating controls
  • Exception tracking and retest
  • Review relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Evidence is based on official CVE and NVD records, as well as a source reference from WatchGuard. However, details are limited, and further verification is recommended. The vulnerability has a HIGH CVSS severity and potential for arbitrary code execution. Users should verify affected systems and apply vendor remediation as soon as possible.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-13050 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-13050

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-13050 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-13050

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2026-00029

    5d1c2695-1a31-4499-88ae-e847036fd7e3

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.