How severe is CVE-2025-41086?

CVE-2025-41086 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-41086 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-41086?

CVE-2025-41086 affects Gams. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-41086?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-41086 have an EU (EUVD) identifier?

Yes. CVE-2025-41086 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200244.

When was CVE-2025-41086 published?

CVE-2025-41086 was published on 2025-12-02 and last updated on 2026-06-17.

CVE-2025-41086

CVE-2025-41086 is a medium-severity vulnerability in Gams with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 6.9
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-200244
Weakness: CWE-639
Affected product: Gams
Published: 2025-12-02
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-41086?: 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.
How severe is CVE-2025-41086?: CVE-2025-41086 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-41086 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-41086?: CVE-2025-41086 affects Gams. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-41086?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-41086 have an EU (EUVD) identifier?: Yes. CVE-2025-41086 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-200244.
When was CVE-2025-41086 published?: CVE-2025-41086 was published on 2025-12-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gams:gams:*:*:*:*:*:*:*:*

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