{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/windows-cloud-files-mini-filter-driver/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-33835"}],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Windows Cloud Files Mini Filter Driver"],"_cs_severities":["high"],"_cs_tags":["cve","privilege-escalation","windows"],"_cs_type":"advisory","_cs_vendors":["Microsoft"],"content_html":"\u003cp\u003eCVE-2026-33835 is a use-after-free vulnerability affecting the Windows Cloud Files Mini Filter Driver. This vulnerability allows an authenticated local attacker to escalate privileges on the targeted system. The vulnerability exists because the driver improperly handles memory allocation, potentially leading to a situation where freed memory is accessed again. Successful exploitation allows an attacker to gain elevated privileges, potentially leading to complete system compromise. This is a critical issue for any system relying on the Cloud Files Mini Filter Driver, especially those in sensitive environments.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker gains initial access to the system with local user privileges.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious application that interacts with the Cloud Files Mini Filter Driver.\u003c/li\u003e\n\u003cli\u003eThe application triggers a specific sequence of operations in the driver to cause the use-after-free condition.\u003c/li\u003e\n\u003cli\u003eThe driver attempts to access a memory region that has already been freed.\u003c/li\u003e\n\u003cli\u003eThe memory region is now potentially controlled by the attacker due to prior allocation.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages this controlled memory region to overwrite critical kernel structures.\u003c/li\u003e\n\u003cli\u003eThe overwritten kernel structures are used to manipulate the system\u0026rsquo;s privilege levels.\u003c/li\u003e\n\u003cli\u003eThe attacker\u0026rsquo;s application gains elevated privileges due to the kernel manipulation.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2026-33835 allows a local attacker to elevate their privileges on the compromised system. This could allow the attacker to install programs; view, change, or delete data; or create new accounts with full user rights. This vulnerability poses a significant risk to systems running the affected driver and could lead to complete system compromise.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApply the security update provided by Microsoft to patch CVE-2026-33835 as soon as possible.\u003c/li\u003e\n\u003cli\u003eMonitor systems for suspicious process creations originating from unusual locations to detect potential exploit attempts using the provided Sigma rule.\u003c/li\u003e\n\u003cli\u003eEnsure proper user account controls are in place to limit the initial impact of an attacker with low privileges.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-12T18:19:52Z","date_published":"2026-05-12T18:19:52Z","id":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-33835/","summary":"CVE-2026-33835 is a use-after-free vulnerability in the Windows Cloud Files Mini Filter Driver, allowing a local attacker to elevate privileges.","title":"CVE-2026-33835 - Windows Cloud Files Mini Filter Driver Use-After-Free Privilege Escalation","url":"https://feed.craftedsignal.io/briefs/2026-05-cve-2026-33835/"}],"language":"en","title":"CraftedSignal Threat Feed — Windows Cloud Files Mini Filter Driver","version":"https://jsonfeed.org/version/1.1"}