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Vulnerability record · CVE-2026-23666 · published 14 April 2026

CVE-2026-23666: Microsoft .net framework vulnerability

Microsoft · .Net Framework

Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.

7.5 CVSS 3.1 High EPSS 1.3% · top 30.1% CWE-755 · CWE-755CWE-366 · CWE-366
7.5CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
15 Jul 2026Last modified by NVD

Description

Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666 Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-23666
https://bugzilla.redhat.com/show_bug.cgi?id=2458271
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23666.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-23666), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.