CVE-2026-41089

CRITICAL

Published May 12, 2026 Modified May 15, 2026 CWE-121

Description

Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.

CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0013

Probability of exploitation

0.32%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-121 CWE-121

Affected Products

Vendor	Product	Versions
microsoft	windows_server_2012	All
microsoft	windows_server_2012	All
microsoft	windows_server_2016	< 10.0.14393.9140
microsoft	windows_server_2019	< 10.0.17763.8755
microsoft	windows_server_2022	< 10.0.20348.5074
microsoft	windows_server_2022_23h2	< 10.0.25398.2330
microsoft	windows_server_2025	< 10.0.26100.32772

References

Advisories & Patches

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089

Frequently Asked Questions

What is CVE-2026-41089? +

Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-41089? +

CVE-2026-41089 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41089? +

CVE-2026-41089 affects products from microsoft, specifically: windows_server_2012, windows_server_2016, windows_server_2019, windows_server_2022, windows_server_2022_23h2, windows_server_2025. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41089? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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