{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-41086","assignerOrgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","state":"PUBLISHED","assignerShortName":"INCIBE","dateReserved":"2025-04-16T09:09:36.724Z","datePublished":"2025-12-02T13:22:23.415Z","dateUpdated":"2025-12-02T14:24:21.854Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"GAMS","vendor":"AMS Development Corp.","versions":[{"lessThanOrEqual":"49.6.0","status":"affected","version":"0","versionType":"custom"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:ams_development_corp.:gams:*:*:*:*:*:*:*:*","versionEndIncluding":"49.6.0","versionStartIncluding":"0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"credits":[{"lang":"en","type":"finder","value":"Juan Embid Sánchez"},{"lang":"en","type":"finder","value":"Francisco Guerrero Gallardo"}],"datePublic":"2025-11-28T11:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Vulnerability in the access control system of the GAMS licensing system that allows unlimited valid licenses to be generated, bypassing any usage restrictions. The validator uses an insecure checksum algorithm; knowing this algorithm and the format of the license lines, an attacker can recalculate the checksum and generate a valid license to grant themselves full privileges without credentials or access to the source code, allowing them unrestricted access to GAMS's mathematical models and commercial solvers."}],"value":"Vulnerability in the access control system of the GAMS licensing system that allows unlimited valid licenses to be generated, bypassing any usage restrictions. The validator uses an insecure checksum algorithm; knowing this algorithm and the format of the license lines, an attacker can recalculate the checksum and generate a valid license to grant themselves full privileges without credentials or access to the source code, allowing them unrestricted access to GAMS's mathematical models and commercial solvers."}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","description":"CWE-639 Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"0cbda920-cd7f-484a-8e76-bf7f4b7f4516","shortName":"INCIBE","dateUpdated":"2025-12-02T13:22:23.415Z"},"references":[{"url":"https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-gams-gams-development-corp"},{"tags":["patch","release-notes"],"url":"https://www.gams.com/latest/docs/RN_51.html"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"The vulnerability has been fixed in GAMS version 51."}],"value":"The vulnerability has been fixed in GAMS version 51."}],"source":{"discovery":"EXTERNAL"},"title":"Authorization bypass in GAMS from GAMS Development Corp.","x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-12-02T14:24:13.177532Z","id":"CVE-2025-41086","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-12-02T14:24:21.854Z"}}]}}