CVE-2026-41089

CWE-121Published: May 12, 2026· Updated: May 15, 2026

9.8

CVSS v3.1

EPSS:0.09%probability of exploitation in 30 daysPercentile:25.9th

Official Description

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

NVD Source

Technical Analysis

CVE-2026-41089 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CISA has added CVE-2026-41089 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

Microsoft6 products

windows server 2012windows server 2016windows server 2019windows server 2022windows server 2022 23h2windows server 2025

Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild

Exploit-DB

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

PacketStorm

Security advisories & exploits

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089

News & Research Mentioning CVE-2026-41089

Critical Windows Netlogon Vulnerability in Attackers’ Crosshairs

SecurityWeek· Jun 1, 2026

Organizations are advised to patch CVE-2026-41089 as soon as possible, given its severity, the potential ongoing exploitation. The post Critical Windows Netlogon Vulnerability in Attackers’ Crosshairs appeared first on SecurityWeek. [xlite_meta score:50 src:SecurityWeek xlite_fp:7e188849a4572a65f4e76d643582b65f74294f4aeccfe4631c9a7040d191714e]