{"id":"CVE-2026-111090","title":"Improper Signature Verification of Firmware Update Files","summary":"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 automati…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-287"],"vendor":"Stormshield","product":"Stormshield Network Security","affected":["network_security >= 4.3.0 <= 4.3.44","network_security >= 4.8.0 <= 4.8.19","network_security >= 5.0.0 <= 5.0.9","network_security >= 5.1.0 <= 5.1.3"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T07:42:53.842Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111090","references":[{"url":"https://advisories.stormshield.eu/2026-031/"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T07:55:43.636Z","slug":"CVE-2026-111090","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `network_security >= 4.3.0 <= 4.3.44`\n- `network_security >= 4.8.0 <= 4.8.19`\n- `network_security >= 5.0.0 <= 5.0.9`\n- `network_security >= 5.1.0 <= 5.1.3`\n\n## Remediation\n\nThe following updates will fix this vulnerability:\n\n\n\n\n\n  *  \n\nSNS 5.1.4 EA\n\n\n  *  \n\nSNS 5.0.10\n\n\n  *  \n\nSNS 4.8.20 LTSB\n\n### Workarounds\n\nIf applicable, verify the SHA-256 hash of each update file. The reference hashes are available in the MyStormshield portal","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}