CVE-2026-111090: high-severity vulnerability in Stormshield Network Security
Improper Signature Verification of Firmware Update Files
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.2%
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Stormshield · Stormshield Network SecurityRelated CVEs — Stormshield Network Security
In the same product, most dangerous first.
CVE-2026-14466MEDIUMPossible XSS in the SNS web administration panelEPSS 0.2%CVE-2026-8482MEDIUMInformation leak in NSRPC client historyEPSS 0.2%CVE-2026-113465MEDIUMPossible DOM XSS in SNS Web Administration PortalEPSS 0.2%CVE-2026-111088MEDIUMStored XSS in the VPN logs monitorEPSS 0.2%CVE-2026-113808HIGHStored XSS on SNS Enrollment PortalEPSS 0.2%CVE-2026-113469HIGHImproper Signature Verification of Active Update FilesEPSS 0.2%