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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-41086 Detail

Description

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

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  Spanish National Cybersecurity Institute, S.A. (INCIBE)
CVSS-B 6.9 MEDIUM
Vector:  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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://www.gams.com/latest/docs/RN_51.html Spanish National Cybersecurity Institute, S.A. (INCIBE)
https://www.incibe.es/en/incibe-cert/notices/aviso/authorization-bypass-gams-gams-development-corp Spanish National Cybersecurity Institute, S.A. (INCIBE)

Weakness Enumeration

CWE-ID CWE Name Source
CWE-639 Authorization Bypass Through User-Controlled Key Spanish National Cybersecurity Institute, S.A. (INCIBE)  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-41086
NVD Published Date:
12/02/2025
NVD Last Modified:
12/02/2025
Source:
Spanish National Cybersecurity Institute, S.A. (INCIBE)