PT-2026-40187 · Microsoft · .Net Framework

Published 2026-05-12 · Updated 2026-05-19 · CVE-2026-35433

Positive Technologies (AI Summary)

CVSS v3.1

7.3

High

Base vector

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

Name of the Vulnerable Software and Affected Versions .NET (affected versions not specified)

Description Improper input validation in .NET allows an unauthorized attacker to elevate privileges locally.

Fix

DoS

LPE

RCE

Heap Based Buffer Overflow

Integer Overflow

Weakness Enumeration

CWE-20

CWE-122

CWE-190

Related Identifiers

BDU:2026-06599

CVE-2026-35433

GHSA-8X9C-MQXV-Q2PP

Affected Products

.Net Framework

References · 17

• https://osv.dev/vulnerability/GHSA-8x9c-mqxv-q2pp · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-35433 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-35433 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-35433 · Security Note
• https://bdu.fstec.ru/vul/2026-06599 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35433 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-35433 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-35433 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-35433 · Vendor Advisory
• https://github.com/dotnet/wpf/security/advisories/GHSA-8x9c-mqxv-q2pp · Note
• https://github.com/dotnet/wpf · Note
• https://github.com/dotnet/announcements/issues/398 · Note
• https://twitter.com/nims213/status/2054263495550493059 · Twitter Post
• https://twitter.com/f1tym1/status/2055158680404828475 · Twitter Post
• https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-may-2026-servicing-updates · Note