CVE-2026-33826

Name: CVE-2026-33826
Creator: NVD / NIST
Published: 2026-04-14T18:17:35.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2026-33826 is a high-severity vulnerability rated 8/10 on the CVSS scale. Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.

Metrics

CVSS 3.1

8/10

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

EPSS Probability

0.53%

41.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Microsoft	Windows Server 2012	r2
Microsoft	Windows Server 2016	< 10.0.14393.9060
Microsoft	Windows Server 2019	< 10.0.17763.8644
Microsoft	Windows Server 2022	< 10.0.20348.5020
Microsoft	Windows Server 2022 23h2	< 10.0.25398.2274
Microsoft	Windows Server 2025	< 10.0.26100.32690

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33826Vendor Advisory

Timeline

Published: Apr 14, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33826?

Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.

How severe is CVE-2026-33826?

CVE-2026-33826 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33826?

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-2026-33826?

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

Scan your code now

Source: NVD / NIST