{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/netlogon/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":9.8,"id":"CVE-2026-41089"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Netlogon"],"_cs_severities":["critical"],"_cs_tags":["cve","buffer-overflow","netlogon","rce"],"_cs_type":"threat","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-41089 is a critical vulnerability affecting Windows Netlogon, a core authentication component. The vulnerability is a stack-based buffer overflow which enables remote code execution by an unauthenticated attacker over the network. An attacker could exploit this vulnerability by sending a specially crafted request to a domain controller running the Netlogon service. Successful exploitation could lead to full system compromise of the domain controller. Microsoft has released a security update to address this vulnerability. Defenders should prioritize patching vulnerable systems to prevent potential exploitation.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker identifies a vulnerable Windows server running the Netlogon service on a network.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious network request designed to trigger the stack-based buffer overflow.\u003c/li\u003e\n\u003cli\u003eAttacker sends the specially crafted request to the target server\u0026rsquo;s Netlogon service.\u003c/li\u003e\n\u003cli\u003eThe Netlogon service processes the malicious request, causing the stack buffer to overflow.\u003c/li\u003e\n\u003cli\u003eThe overflow overwrites critical data on the stack, including return pointers.\u003c/li\u003e\n\u003cli\u003eThe overwritten return pointer is redirected to attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eAttacker-controlled code executes with SYSTEM privileges.\u003c/li\u003e\n\u003cli\u003eThe attacker gains full control over the compromised system, potentially leading to lateral movement and data exfiltration.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-41089 allows an unauthenticated attacker to execute arbitrary code with SYSTEM privileges on a vulnerable Windows server. This can lead to full system compromise, including domain controllers. The impact includes data breaches, system disruption, and potential lateral movement within the network. Given the criticality of Netlogon for domain authentication, this vulnerability poses a significant risk to organizations using affected Windows versions.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImmediately patch CVE-2026-41089 on all affected Windows systems, especially domain controllers, using the update provided by Microsoft (reference: \u003ca href=\"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089)\"\u003ehttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41089)\u003c/a\u003e.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect CVE-2026-41089 Exploitation Attempt via Malformed Netlogon Request\u0026rdquo; to detect potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eMonitor network traffic for suspicious Netlogon requests originating from unexpected sources.\u003c/li\u003e\n\u003cli\u003eEnable Windows Event Logging for Netlogon events to facilitate investigation of potential incidents.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-12T18:41:40Z","date_published":"2026-05-12T18:41:40Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41089-netlogon-overflow/","summary":"CVE-2026-41089 is a stack-based buffer overflow vulnerability in Windows Netlogon that allows an unauthorized attacker to execute arbitrary code over a network.","title":"CVE-2026-41089 - Windows Netlogon Stack-Based Buffer Overflow","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-41089-netlogon-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — Netlogon","version":"https://jsonfeed.org/version/1.1"}