CVE-2026-23666 | BDVDB-2026-326806 Detail

MicrosoftMicrosoft .NET Framework 3.5

Description#

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

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

No public exploit known

7.5 High

1.3%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 71.3.

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Improper Error Handling

No specific action is recorded in the source data. Check the references for vendor guidance.

Vulnerable
>= 3.5.0 and < 2.0.50727.8982 & 3.0.30729.8976
Fixed
2.0.50727.8982 & 3.0.30729.8976

Not available

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C

Not available

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).