PT-2026-58191 · Microsoft · Windows Server+1

CVE-2026-50311 · Published 2026-07-14 · Updated 2026-07-15

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Server (affected versions not specified)

Description Improper access control allows an authorized attacker to elevate privileges locally, effectively turning a basic login into a mechanism for privilege escalation.

Recommendations Deploy the latest security updates provided by Microsoft.

Fix

LPE

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

BDU:2026-10016

CVE-2026-50311

ZDI-26-417

Affected Products

Windows

Windows Server

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-50311 · Security Note
• https://bdu.fstec.ru/vul/2026-10016 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50311 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-50311 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-50311 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-26-417 · Security Note
• https://twitter.com/windowsforum/status/2077237501006164301 · Twitter Post