[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fJVHzrTgPTubTg-xPhdsDLTHKtSlEfvyPwkk-sJwmVks":3},{"article":4,"iocs":51,"watch_terms":52,"solutions":53,"lesson":146},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":28,"category":29,"article_tags":33},"d2cc06f9-9b53-4ce2-ae70-b2caaf562455","New Windows SignDrop zero-day gives hackers SYSTEM privileges","new-windows-signdrop-zero-day-gives-hackers-system-privileges-1dc09f","Security researcher Abdelhamid Naceri (also known as Nightmare Eclipse) has released a new Windows zero-day exploit that can let attackers gain SYSTEM privileges. [...]","Security researcher Abdelhamid Naceri has released a new Windows zero-day exploit named SignDrop that allows attackers to gain SYSTEM privileges. The exploit targets a flaw in Microsoft's CLFS driver mitigation, enabling privileged processes like Windows Defender to create authentication files with SYSTEM privileges. Naceri estimates 80% of Windows installations are vulnerable, and there is currently no fix other than waiting for a patch from Microsoft.","New Windows SignDrop zero-day exploit allows attackers to gain SYSTEM privileges.","https:\u002F\u002Fwww.bleepingcomputer.com\u002Fnews\u002Fsecurity\u002Fnew-windows-signdrop-zero-day-gives-hackers-system-privileges\u002F","https:\u002F\u002Fwww.bleepstatic.com\u002Fcontent\u002Fhl-images\u002F2026\u002F11\u002F12\u002F0_Windows-headpic.jpg","2026-11-12T16:04:00+00:00","2026-11-12T17:00:07.816463+00:00",9,[17,20,22,25],{"name":18,"type":19},"Windows","product",{"name":21,"type":19},"Windows Defender",{"name":23,"type":24},"CLFS driver","technology",{"name":26,"type":27},"Nightmare Eclipse","threat_actor","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":28,"icon":30,"name":31,"slug":32},null,"Vulnerabilities","vulnerabilities",[34,39,44,46],{"category":35},{"id":36,"icon":30,"name":37,"slug":38},"574f766a-fb3f-487c-8d2c-0720ae75471b","Zero-day","zero-day",{"category":40},{"id":41,"icon":30,"name":42,"slug":43},"6cbdd207-aaa1-4176-9534-e156b125e917","Nation-state","nation-state",{"category":45},{"id":28,"icon":30,"name":31,"slug":32},{"category":47},{"id":48,"icon":30,"name":49,"slug":50},"89f78b1c-3503-45a1-9fc7-e23d2ce1c6d5","Malware","malware",[],[18,21],{"controls":54,"vendors":142},[55,84,113],{"slug":56,"name":57,"problem":58,"products":59},"privileged-access-management","Privileged access management (PAM)","Admin accounts stop being one stolen password away from control of everything.",[60,68,76],{"vendor_slug":61,"vendor_name":62,"vendor_logo":63,"product_slug":64,"product_name":65,"url":66,"description":67},"wallix","WALLIX","\u002Fvendor-logos\u002Fwallix.png","wallix-pam","WALLIX PAM","https:\u002F\u002Fwww.wallix.com\u002Fproducts\u002Fprivileged-access-management-software\u002F","Privileged access management with session recording, for IT and OT environments.",{"vendor_slug":69,"vendor_name":70,"vendor_logo":71,"product_slug":72,"product_name":73,"url":74,"description":75},"palo-alto-networks","Palo Alto Networks","\u002Fvendor-logos\u002Fpalo-alto-networks.png","idira-privileged-access-management","Idira Privileged Access Management","https:\u002F\u002Fwww.paloaltonetworks.com\u002Fidira\u002Fhuman\u002Fprivileged-access-management","Privileged access management from the former CyberArk portfolio: vaulting, rotation, just-in-time access and session monitoring.",{"vendor_slug":77,"vendor_name":78,"vendor_logo":79,"product_slug":80,"product_name":81,"url":82,"description":83},"beyondtrust","BeyondTrust","\u002Fvendor-logos\u002Fbeyondtrust.png","password-safe","BeyondTrust Password Safe","https:\u002F\u002Fwww.beyondtrust.com\u002Fproducts\u002Fpassword-safe","Privileged password and session management.",{"slug":85,"name":86,"problem":87,"products":88},"patch-management","Automated patch management","Known holes get closed in days, not months.",[89,97,105],{"vendor_slug":90,"vendor_name":91,"vendor_logo":92,"product_slug":93,"product_name":94,"url":95,"description":96},"action1","Action1","\u002Fvendor-logos\u002Faction1.png","action1-patch-management","Action1 Patch Management","https:\u002F\u002Fwww.action1.com\u002F","Cloud-native patch management for Windows, macOS and third-party applications.",{"vendor_slug":98,"vendor_name":99,"vendor_logo":100,"product_slug":101,"product_name":102,"url":103,"description":104},"microsoft","Microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","intune","Microsoft Intune","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fmicrosoft-intune","Device management for Windows, macOS, iOS and Android, including update rings and compliance policies.",{"vendor_slug":106,"vendor_name":107,"vendor_logo":108,"product_slug":109,"product_name":110,"url":111,"description":112},"manageengine","ManageEngine","\u002Fvendor-logos\u002Fmanageengine.png","patch-manager-plus","ManageEngine Patch Manager Plus","https:\u002F\u002Fwww.manageengine.com\u002Fpatch-management\u002F","Patch management for operating systems and third-party applications, on premises or in the cloud.",{"slug":114,"name":115,"problem":116,"products":117},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",[118,126,134],{"vendor_slug":119,"vendor_name":120,"vendor_logo":121,"product_slug":122,"product_name":123,"url":124,"description":125},"eset","ESET","\u002Fvendor-logos\u002Feset.png","eset-protect","ESET PROTECT","https:\u002F\u002Fwww.eset.com\u002Fint\u002Fbusiness\u002Fsolutions\u002Fendpoint-protection\u002F","Endpoint protection platform with detection and response add-ons.",{"vendor_slug":127,"vendor_name":128,"vendor_logo":129,"product_slug":130,"product_name":131,"url":132,"description":133},"sentinelone","SentinelOne","\u002Fvendor-logos\u002Fsentinelone.png","singularity-endpoint","Singularity Endpoint","https:\u002F\u002Fwww.sentinelone.com\u002Fplatform\u002Fendpoint-security\u002F","Endpoint protection and detection with automated response and rollback.",{"vendor_slug":135,"vendor_name":136,"vendor_logo":137,"product_slug":138,"product_name":139,"url":140,"description":141},"withsecure","WithSecure","\u002Fvendor-logos\u002Fwithsecure.png","elements-xdr","WithSecure Elements XDR","https:\u002F\u002Fwww.withsecure.com\u002Fen\u002Ffor-business\u002Fplatform\u002Fxdr\u002F","Endpoint detection and response with extended detection, on the Elements cloud platform.",[143],{"slug":98,"name":99,"logo_path":100,"roles":144},[145],"affected",{"slug":147,"title":148,"body":149,"framework_refs":150,"framework_notes":156},"windows-zero-day-grants-system-privileges-with-no-patch-available","Windows Zero-Day Grants SYSTEM Privileges With No Patch Available","A newly disclosed zero-day exploit dubbed SignDrop exploits a flaw in Microsoft's CLFS driver mitigation, allowing attackers to escalate privileges to SYSTEM level by abusing trusted processes like Windows Defender. With an estimated 80% of Windows installations affected and no patch currently available, organizations face a critical window of exposure they cannot close through standard patching alone. This incident underscores the inherent risk of depending entirely on vendor patches as the sole line of defense against privilege escalation vulnerabilities. When no fix exists, organizations must rely on compensating controls—such as monitoring for suspicious privilege changes, restricting high-privilege process interactions, and limiting attack surface—to reduce risk until a patch is released.",[151,152,153,154,155],"CIS Control 7: Continuous Vulnerability Management (v8)","NIST SP 800-53 SI-2: Flaw Remediation","NIST CSF 2.0 RS.MI-01: Incidents are contained","MITRE ATT&CK T1068: Exploitation for Privilege Escalation","NIS2 Article 21(2)(e)",{"NIS2 Article 21(2)(e)":157,"NIST SP 800-53 SI-2: Flaw Remediation":158,"NIST CSF 2.0 RS.MI-01: Incidents are contained":159,"CIS Control 7: Continuous Vulnerability Management (v8)":160,"MITRE ATT&CK T1068: Exploitation for Privilege Escalation":161},"This point requires entities to have processes for vulnerability handling and disclosure, which applies directly to managing the risk posed by an unpatched zero-day privilege escalation flaw.","SI-2 requires organizations to identify, report, and correct information system flaws, and to implement interim protective measures when official patches do not yet exist.","In the absence of a patch, organizations must apply compensating controls to contain the potential impact of exploitation of this privilege escalation vulnerability.","This control requires organizations to continuously assess and remediate vulnerabilities, including tracking zero-days and applying compensating controls when patches are unavailable.","The SignDrop exploit directly maps to this technique, where adversaries exploit software vulnerabilities to elevate their privileges to SYSTEM level on a compromised host."]