CVE-2026-111090: French Stormshield firewalls could accept unauthenticated updates

Not listed so far in CISA’s catalog of actively exploited vulnerabilities.

Our analyses

French Stormshield firewalls could accept unauthenticated updates

Stormshield has fixed errors in how its firewalls verify the digital signature of updates. Another flaw, rated more serious, remains undisclosed. Fixed versions and precautions.

Oct 21, 20262 min read

What to do

Check whether your estate includes the affected product, including internet-facing devices.
Apply the vendor’s patch or mitigations (references below).
Watch for exploitation: this entry is updated if the vulnerability enters the exploited catalog or is the subject of a CERT-FR alert.

References

NVD entry (NIST)