Threat Intelligence / CVE / CVE-2026-41089

CVE-2026-41089 — Microsoft Windows Server 2012

CVSS v3.1 9.8 (CRITICAL) · EPSS 0.1% (higher than 32.0% of all scored CVEs) · Priority 6.2/10 · Published 2026-05-12

As of 2026-05-26, CVE-2026-41089 is a CRITICAL-severity vulnerability in Microsoft Windows Server 2012, CVSS v3.1 9.8, EPSS 0.1% (32.0th percentile). Threadlinqs Intelligence links 3 tracked threat campaigns to CVE-2026-41089, most recently “Microsoft's MDASH AI Scanning Harness Uncovers 16 Windows CVEs, Including Four Critical RCE Flaws in TCP/IP, IKEv2, Netlogon, and DNS”.

Last updated: 2026-05-26

What is CVE-2026-41089?

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

The record classifies CVE-2026-41089 under weakness class CWE-121. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 10 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 123 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 9.8 — CRITICAL
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
EPSS (FIRST): 0.1% probability of exploitation in the next 30 days, higher than 32.0% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 6.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2026-05-12, last modified 2026-05-26

Is CVE-2026-41089 being exploited?

It currently carries a trending score of 13 in the Threadlinqs vulnerability feed.

Affected products and versions

Microsoft: Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation)

How to fix CVE-2026-41089

No vendor patch reference has been recorded for CVE-2026-41089 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-41089

3 tracked threats in the Threadlinqs corpus reference CVE-2026-41089, either in the campaign’s CVE list or as an indicator on the campaign record.

Microsoft's MDASH AI Scanning Harness Uncovers 16 Windows CVEs, Including Four Critical RCE Flaws in TCP/IP, IKEv2, Netlogon, and DNS — CRITICAL · 2026-07-10
Windows Netlogon 0-Click RCE CVE-2026-41089 — Active Exploitation in the Wild (Domain Controller Takeover) — CRITICAL · 2026-06-01
Microsoft May 2026 Patch Tuesday — 137 CVEs, 31 Critical (16 RCE) Including CVE-2026-41089 Pre-Auth Netlogon Stack Overflow on Domain Controllers — HIGH · 2026-05-12

Sources

Seeded from cveorg and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

msrc.microsoft.com

Full detection coverage & IOCs for threats exploiting CVE-2026-41089 are available via the Threadlinqs MCP server (Purple tier). View plans →

← all vulnerabilities · Markdown version · Threadlinqs Intelligence