PT-2026-40133 · Microsoft · .Net Framework

Published 2026-05-12 · Updated 2026-05-19 · CVE-2026-32177

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 A heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally. A heap-based buffer overflow occurs when an application writes more data to a heap-allocated memory block than it can hold, potentially leading to memory corruption.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Heap Based Buffer Overflow

Weakness Enumeration

CWE-20

CWE-122

Related Identifiers

BDU:2026-06742

CVE-2026-32177

Affected Products

.Net Framework

References · 14

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32177 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06742 · Security Note
• https://ubuntu.com/security/CVE-2026-32177 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-32177 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-32177 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-32177 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-32177 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-32177 · Security Note
• https://github.com/dotnet/announcements/issues/399 · Note
• https://twitter.com/f1tym1/status/2055149840464580954 · Twitter Post
• https://docs.bell-sw.com/security/cves/CVE-2026-32177 · Note
• https://twitter.com/nims213/status/2054263495550493059 · Twitter Post
• https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-may-2026-servicing-updates · Note
• https://twitter.com/windowsforum/status/2054254972456382668 · Twitter Post