PT-2026-40158 · Microsoft · Windows Ldap+1

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-34339

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A null pointer dereference in the Lightweight Directory Access Protocol (LDAP) allows an authorized attacker to cause a local denial of service. A null pointer dereference occurs when a program attempts to read or write to a memory location using a pointer that is null, typically leading to a system crash.

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

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-07125

CVE-2026-34339

Affected Products

Windows

Windows Ldap

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-34339 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34339 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07125 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-34339 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-34339 · Security Note