ZDI-26-632: WatchGuard FireWare OS epm connect Stack-based Buffer Overflow Remote Code Execution Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Sep 9, 2026 · Catalog

   Detected

   This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-13086.

Sources

• CVE.orgVulnerability recordCVE-2026-13086

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-13086

  30-day exploitation probability 0.4%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-632

  This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of WatchGuard FireWare OS. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-13086.

  zerodayinitiative.com