PT-2026-7347 · Microsoft · Windows

Published 2026-02-10 · Updated 2026-02-10 · CVE-2026-21243

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

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

Description A flaw exists in the Windows Lightweight Directory Access Protocol (LDAP) implementation that could allow an unauthorized attacker to cause a denial of service over a network. This issue may lead to system disruption. The vulnerability allows attackers to affect the system.

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:2026-01747

CVE-2026-21243

Affected Products

Windows

References · 6

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21243 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21243 · Security Note
• https://bdu.fstec.ru/vul/2026-01747 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-21243 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-21243 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-21243 · Vendor Advisory