CVE-2026-20812

Name: CVE-2026-20812
Creator: NVD / NIST
Published: 2026-01-13T18:16:07.913+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.12%

Last modified Jun 17, 2026

CVE-2026-20812 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.. EPSS estimates a 1.12% chance of exploitation in the next 30 days.

Description

Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

1.12%

61.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Microsoft	Windows 10 1607	< 10.0.14393.8783
Microsoft	Windows 10 1809	< 10.0.17763.8276
Microsoft	Windows 10 21h2	< 10.0.19044.6809
Microsoft	Windows 10 22h2	< 10.0.19045.6809
Microsoft	Windows 11 23h2	< 10.0.22631.6491
Microsoft	Windows 11 24h2	< 10.0.26100.7623
Microsoft	Windows 11 25h2	< 10.0.26200.7623
Microsoft	Windows Server 2016	< 10.0.14393.8783
Microsoft	Windows Server 2019	< 10.0.17763.8276
Microsoft	Windows Server 2022	< 10.0.20348.4648
Microsoft	Windows Server 2022 23h2	< 10.0.25398.2092
Microsoft	Windows Server 2025	< 10.0.26100.32230

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20812Vendor Advisory

Timeline

Published: Jan 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20812?

Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.

How severe is CVE-2026-20812?

CVE-2026-20812 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.12% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20812?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20812?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST