CVE-2026-111090

Improper Signature Verification of Firmware Update Files

Published Oct 20, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
A logic error exists in the signature verification routine resulting in acceptance of unauthenticated update and license files.It is necessary to use only the MyStormshield servers to retrieve update files or licenses, or to use automatic verification via SNS.

Remediation

Vendor Solution

The following updates will fix this vulnerability: * SNS 5.1.4 EA * SNS 5.0.10 * SNS 4.8.20 LTSB


Vendor Workaround

If applicable, verify the SHA-256 hash of each update file. The reference hashes are available in the MyStormshield portal

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Stormshield
Stormshield stormshield Network Security
Vendors & Products Stormshield
Stormshield stormshield Network Security
Type Values Removed Values Added
Description A logic error exists in the signature verification routine resulting in acceptance of unauthenticated update and license files.It is necessary to use only the MyStormshield servers to retrieve update files or licenses, or to use automatic verification via SNS.
Title Improper Signature Verification of Firmware Update Files
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
airbus
Published
Updated
Oct 20, 2026, 7:13 PM
Reserved
Oct 15, 2026, 3:01 PM
Status
Deferred
Published
Oct 20, 2026, 8:16 AM
Modified
Oct 20, 2026, 7:35 PM