CVE-2026-41089: critical vulnerability in Microsoft Windows Server 2012
Windows Netlogon Remote Code Execution Vulnerability
Published · Updated
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97Vexday Risk Score
Prioritize patching. It exploitation observed by VulnCheck and has a public proof of concept.
ssvc Actcvss 9.8epss 78%
from disclosure to weapon20 days
Published on NVDMay 12
1st PoC+20d
VulnCheck+17d
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
Microsoft · Windows Server 2012Microsoft · Windows Server 2012 R2Microsoft · Windows Server 2012 R2 (Server Core installation)Microsoft · Windows Server 2012 (Server Core installation)Microsoft · Windows Server 2016Microsoft · Windows Server 2016 (Server Core installation)Microsoft · Windows Server 2019Microsoft · Windows Server 2019 (Server Core installation)Microsoft · Windows Server 2022Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft · Windows Server 2025Microsoft · Windows Server 2025 (Server Core installation)public PoCs found — 20
githubgithub.com/0xABCD01/CVE-2026-41089★ 209githubgithub.com/HydraSoft/CVE-2026-41089-Netlogon-RCE★ 27githubgithub.com/hnytgl/CVE-2026-41089★ 14githubgithub.com/ADScanPro/CVE-2026-41089-LongLogon★ 13githubgithub.com/0xBlackash/CVE-2026-41089★ 10githubgithub.com/opensource-arrozconpollo191/CVE-2026-41089-Netlogon-RCE★ 1githubgithub.com/jenniferreire26/CVE-2026-41089★ 0githubgithub.com/phil-dirt/CVE-2026-41089-LongLogon★ 0githubgithub.com/hnytgl/CVE-2026-41089-Detector★ 0vulncheckvulncheck.com/xdb/9b81c23d6aedunverifiedvulncheckvulncheck.com/xdb/06d95e39375aunverifiedvulncheckvulncheck.com/xdb/5b5280494a69unverifiedvulncheckvulncheck.com/xdb/a04093695b75unverifiedvulncheckvulncheck.com/xdb/aee444243848unverifiedvulncheckvulncheck.com/xdb/58138d2eac51unverifiedvulncheckvulncheck.com/xdb/f9eb0516edf9unverifiedvulncheckvulncheck.com/xdb/25670de2c034unverifiedvulncheckvulncheck.com/xdb/aa4d0b06a72funverifiedvulncheckvulncheck.com/xdb/8014b2798461unverifiedvulncheckvulncheck.com/xdb/e3281dac4b8eunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Microsoft Windows Server 2012
In the same product, most dangerous first.
CVE-2025-59287CRITICALWindows Server Update Service (WSUS) Remote Code Execution VulnerabilityEPSS 100.0%KEVCVE-2021-34527HIGHWindows Print Spooler Remote Code Execution VulnerabilityEPSS 99.8%KEVCVE-2023-36884HIGHWindows Search Remote Code Execution VulnerabilityEPSS 99.4%KEVCVE-2020-1472MEDIUMNetlogon Elevation of Privilege VulnerabilityEPSS 99.4%KEVCVE-2022-30190HIGHMicrosoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution VulnerabilityEPSS 99.2%KEVCVE-2021-40444HIGHMicrosoft MSHTML Remote Code Execution VulnerabilityEPSS 97.8%KEV