Buffer overflow in Microsoft Windows Server 2012
CVE-2026-41089
Stack-based buffer overflow in Windows Netlogon allows an unauthorized attacker to execute code over a network.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Microsoft Windows Server 2012 — versions 6.2.9200.0
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2012 R2 — versions 6.3.9600.0
- Microsoft Windows Server 2012 R2 (Server Core Installation) — versions 6.3.9600.0
- Microsoft Windows Server 2012 (Server Core Installation) — versions 6.2.9200.0
- Microsoft Windows Server 2016 — versions 10.0.14393.0
- Microsoft Windows Server 2016
- Microsoft Windows Server 2016 (Server Core Installation) — versions 10.0.14393.0
- Microsoft Windows Server 2019 — versions 10.0.17763.0
- Microsoft Windows Server 2019
Weakness classification (CWE)
Public proof-of-concept exploits
- 0xABCD01/CVE-2026-41089
- Darkuoremember32/CVE-2026-41089-470
- Darkuoremember32/CVE-2026-41089-532
- HydraSoft/CVE-2026-41089-Netlogon-RCE
- SyntaxMethod/CVE-2026-41089-Netlogon-RCE-PoC
- ADScanPro/CVE-2026-41089-LongLogon
- hnytgl/CVE-2026-41089
- 0xBlackash/CVE-2026-41089
- ZeroDayVPN/CVE-2026-41089-Netlogon
- opensource-arrozconpollo191/CVE-2026-41089-Netlogon-RCE
References
- Windows Netlogon Remote Code Execution Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-41089?
- CVE-2026-41089 is a critical-severity vulnerability in Microsoft Windows Server 2012, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-05-12.
- How severe is CVE-2026-41089?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-41089 known to be exploited?
- 35 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.