Improper Validation of Specified Type of Input in Microsoft .NET Framework - CVE-2026-97801
Published: October 14, 2026
Vulnerability identifier: #VU155614
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-97801
CWE-ID: CWE-1287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform tampering.
The vulnerability exists due to improper validation of specified types of input in .NET Framework when processing input received over a network. A remote attacker can supply input that is improperly validated to perform tampering.
Affected software
Microsoft .NET Framework
How to mitigate CVE-2026-97801
Install security update from vendor's website.
Microsoft .NET Framework - addressed in versions 2.0.50727.8987 AND 3.0.30729.8982, 2.0.50727.8987 AND 3.0.30729.8982 AND 4.7.4150.0, 2.0.50727.9073 AND 3.0.30729.9070 AND 4.8.4811.0, 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.4811.0, 2.0.50727.9188 AND 3.0.30729.9171 AND 4.8.9363.0, 4.7.4150.0, 4.8.4811.0