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CVE-2026-41089

Windows Netlogon Remote Code Execution Vulnerability

No known exploitation. EPSS puts it in the 62nd percentile. Fixed versions are out.

CVSS 3.19.8CriticalEPSS percentile62nd1.0% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix5 products6 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows Server 2016Affected: ≥ 10.0.14393.0, < 10.0.14393.9140Upgrade to: 10.0.14393.9140Stated by: CVE record
  • Microsoft Windows Server 2019Affected: ≥ 10.0.17763.0, < 10.0.17763.8755Upgrade to: 10.0.17763.8755Stated by: CVE record
  • Microsoft Windows Server 2022Affected: ≥ 10.0.20348.0, < 10.0.20348.5139Upgrade to: 10.0.20348.5139Affected: ≥ 10.0.25398.0, < 10.0.25398.2330Upgrade to: 10.0.25398.2330Stated by: CVE record
  • Microsoft Windows Server 2025Affected: ≥ 10.0.26100.0, < 10.0.26100.32860Upgrade to: 10.0.26100.32860Stated by: CVE record
  • Microsoft Windows Server 2012Affected: ≥ 6.2.9200.0, < 6.2.9200.26079Upgrade to: 6.2.9200.26079Stated by: CVE record

Versions as the sources state them. 1 more product has version data. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS62nd
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

1.0% chance of exploitation activity in the next 30 days, which ranks it in the 62nd percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

14 events over 141 days, from the signal feeds we watch.

  1. EPSS band changehigh → low
  2. EPSS band changehigh → lowepss band change
  3. EPSS band changemoderate → high
  4. EPSS band changemoderate → high
  5. EPSS band changemoderate → high
  6. OpenVAS check added

Affected products

And 25 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

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

Scored 9.8 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

In the news

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