PT-2026-40160 · Microsoft · Windows Link-Layer Discovery Protocol+1

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-34341

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Link-Layer Discovery Protocol (LLDP) (affected versions not specified)

Description A double free issue in the Windows Link-Layer Discovery Protocol (LLDP) allows an authorized attacker to elevate privileges locally. A double free occurs when a program attempts to free the same memory location twice, which can lead to system instability or arbitrary code execution.

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

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

BDU:2026-06635

CVE-2026-34341

Affected Products

Windows

Windows Link-Layer Discovery Protocol

References · 5

• https://bdu.fstec.ru/vul/2026-06635 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-34341 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34341 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-34341 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34341 · Security Note