Critical 9.8Published Dec 9, 2025

CVE-2025-66631CSLA .NET is a framework designed for the development of reusable, object-oriented business layers for applications.

Updated under an hour ago (2026-10-19 08:20 UTC)

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It affects cslanet csla_.net. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for cslanet csla_.net

Exploited in the last 30 days

CSLA .NET is a framework designed for the development of reusable, object-oriented business layers for applications. Versions 5.5.4 and below allow the use of WcfProxy. WcfProxy uses the now-obsolete NetDataContractSerializer (NDCS) and is vulnerable to remote code execution during deserialization. This vulnerability is fixed in version 6.0.0. To workaround this issue, remove the WcfProxy in data portal configurations.

CVSS: 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cslanet csla_.net cslanet:csla_.net	before 6.0.0	NVD

References

https://github.com/MarimerLLC/csla/issues/4001issue-tracking
https://github.com/MarimerLLC/csla/pull/4018issue-tracking, patch
https://github.com/MarimerLLC/csla/security/advisories/GHSA-wq34-7f4g-953vmitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.