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Exploitation reportedNot in CISA KEV yetFix available

CVE-2026-41089

Exploitation reported by one source. First attested on 2026-06-02 by GCVE · kevintel.

  • Published2026-05-12
  • WeaknessCWE-121

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2026-05-1218:17CVE publishedNVD
  2. 2026-06-0211:06Listed as exploited by GCVEGCVE
  3. 2026-06-0211:06Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-10-25 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-41089?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-41089?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft windows server 2012
BranchAffectedFixed in
—all versionsno fix published
—= r2no fix published
Microsoft windows server 2016
BranchAffectedFixed in
10.0< 10.0.14393.914010.0.14393.9140
Microsoft windows server 2019
BranchAffectedFixed in
10.0< 10.0.17763.875510.0.17763.8755

3 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

read 2026-10-25 00:28 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
12 repositories, unverified0xABCD01/CVE-2026-41089jelasin/CVE-2026-410890xBlackash/CVE-2026-41089hnytgl/CVE-2026-41089-Detectorhnytgl/CVE-2026-41089
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-05-12
Last Modified
2026-06-17
NVD status
Analyzed
MSRC Title
Windows Netlogon Remote Code Execution Vulnerability

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.

Is CVE-2026-41089 actively exploited?

Active exploitation of CVE-2026-41089 has not been confirmed. Its EPSS score was 79.6% on 2026-10-25, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-41089?

CVE-2026-41089 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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