CVE-2026-19313
Fireware OS Pre-Authentication Heap Buffer Overflow in iked Allows Remote Code Execution
No known exploitation. EPSS puts it in the 53rd percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- WatchGuard Fireware OSAffected: ≥ 2025.0, < 2026.2.2Upgrade to: 2026.2.2Affected: ≥ 12.0, < 12.12.2Upgrade to: 12.12.2Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
An heap overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.7% chance of exploitation activity in the next 30 days, which ranks it in the 53rd percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
14 events over 7 days, from the signal feeds we watch.
- Patch availablerecord updated
- OpenVAS check addedpatch available, record updated
- Patch availablepatch available, patch available, record updated, record updated, record updated
- Publishedweakness classified, att&ck mapped
Affected products
Technical detail
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationmedium confidence
- Privilege EscalationT1068Exploitation for Privilege Escalationhigh confidence
Sources
Watch the software you run.
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We'll flag the next CVE, public exploit or patch for Fireware OS, not every advisory.
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