PT-2026-58718 · Microsoft · .Net 8.0+10

CVE-2026-50649 · Published 2026-07-14 · Updated 2026-07-15

NVD

CVSS v3.1

7.8

High

Base vector

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

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2026-50649

Affected Products

.Net 8.0

.Net 9.0

.Net Framework 3.5

.Net Framework 3.5/4.7.2

.Net Framework 3.5/4.8

.Net Framework 3.5/4.8.1

.Net Framework 4.6.2/4.7/4.7.1/4.7.2

.Net Framework 4.8

Visual Studio 2022 Version 17.12

Visual Studio 2022 Version 17.14

Visual Studio 2026 Version 18.7

References · 3

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50649 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-50649 · Security Note
• https://twitter.com/KooKiz/status/2077326806336557085 · Twitter Post