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CVE-2026-41089

Microsoft Windows Server 2016 buffer overflow

9.8 CRITICALEPSS 0.97%
  1. Published12 May 2026

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows Server 2012r2
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

Remediation

Fixed in
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

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Frequently asked

Is CVE-2026-41089 being actively exploited?

CVE-2026-41089 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.97%.

How severe is CVE-2026-41089?

CVE-2026-41089 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.97% probability of exploitation.

Which products are affected by CVE-2026-41089?

Affected products include Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, and 1 more.

How do I fix CVE-2026-41089?

Upgrade affected software to a fixed version, for example Microsoft Windows Server 2016 10.0.14393.9140, Microsoft Windows Server 2019 10.0.17763.8755, Microsoft Windows Server 2022 10.0.20348.5074 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-41089 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.