PT-2026-40154 · Microsoft · Windows Tcp/Ip+1

Published 2026-05-12 · Updated 2026-05-15 · CVE-2026-34334

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 TCP/IP (affected versions not specified)

Description A race condition occurs due to concurrent execution using a shared resource with improper synchronization in Windows TCP/IP. This allows an authorized attacker to elevate privileges locally.

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

DoS

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2026-06755

CVE-2026-34334

Affected Products

Windows

Windows Tcp/Ip

References · 7

• https://bdu.fstec.ru/vul/2026-06755 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/732317 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34334 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-34334 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34334 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34334 · Security Note
• https://twitter.com/f1tym1/status/2055186300685189441 · Twitter Post