CTI · reviewed · 2026-10-02

WatchGuard patches critical Fireware OS RCE CVE-2026-86131

Full story & timeline

MITRE ATT&CK

• T1190 Exploit Public-Facing Application Initial Access
• T1557 Adversary-in-the-Middle Credential Access

Indicators

No curated indicators tied to this case.

Detections

No detection content yet — case analysis did not yield signal-specific telemetry. Check back after the next daily CTI pass.

References

• https://psirt.watchguard.com/CVE-2026-86131/
• https://www.securityweek.com/watchguard-patches-critical-fireware-os-code-injection-vulnerability/
• https://radar.offseq.com/threat/watchguard-patches-critical-fireware-os-code-injection-vulnerability-36035f2a6c97cfc4