CVE catalog
CVE-2026-23666
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.33% · Oct 25, 2026
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | .net_framework | Not reported | Not reported | unknown |
| Cpe | .net_framework | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://access.redhat.com/security/cve/CVE-2026-23666]
- [https://bugzilla.redhat.com/show_bug.cgi?id=2458271]
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23666]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-23666]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23666.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1100.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]