CVE-2026-3006 | WinFSP up to 2.1.25156 Kernel heap-based overflow

VDB-359764 · CVE-2026-3006 · GCVE-0-2026-3006 WINFSP UP TO 2.1.25156 KERNEL HEAP-BASED OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.3 $0-$5k 2.86+ Summaryinfo A vulnerability was found in WinFSP up to 2.1.25156. It has been declared as critical. This impacts an unknown function of the component Kernel. Executing a manipulation can lead to heap-based overflow. The identification of this vulnerability is CVE-2026-3006. The attack can only be executed locally. There is no exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in WinFSP up to 2.1.25156. It has been declared as critical. This vulnerability affects some unknown processing of the component Kernel. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes: Successful exploitation of the race condition vulnerability could allow an attacker to trigger a kernel heap overflow, potentially leading to local privilege escalation and granting system-level access to the affected software. The weakness was shared by Tay Kiat Loong. The advisory is shared for download at csa.gov.sg. This vulnerability was named CVE-2026-3006 since 02/23/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are neither technical details nor an exploit publicly available. Upgrading to version 2.2B1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Name WinFSP Version 2.1.25156 CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 7.4 VulDB Meta Temp Score: 7.3 VulDB Base Score: 7.8 VulDB Temp Score: 7.5 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.0 CNA Vector (CSA): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Heap-based overflow CWE: CWE-122 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: WinFSP 2.2B1 Timelineinfo 02/23/2026 CVE reserved 04/27/2026 +62 days Advisory disclosed 04/27/2026 +0 days VulDB entry created 04/27/2026 +0 days VulDB entry last update Sourcesinfo Advisory: csa.gov.sg Researcher: Tay Kiat Loong Status: Confirmed CVE: CVE-2026-3006 (🔒) GCVE (CVE): GCVE-0-2026-3006 GCVE (VulDB): GCVE-100-359764 Entryinfo Created: 04/27/2026 06:40 Changes: 04/27/2026 06:40 (65) Complete: 🔍 Cache ID: 99:FB8:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸