Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
6DescriptionCVE.org
A potential improper file path validation vulnerability was reported in some Lenovo Personal Cloud Storage devices that could allow a remote authenticated user to move or access files belonging to other users on the same device.
AnalysisAI
Path traversal in Lenovo Personal Cloud Storage devices allows authenticated remote attackers to move or access files belonging to other users on the same device, enabling unauthorized data disclosure and modification across user boundaries. Affects multiple product lines including Personal Cloud (T1, T2, T2S, T2Pro, X1, X1S, A1, A1S) and Home Storage Hub (T20, X20). CVSS 8.6 reflects high confidentiality and integrity impact with low attack complexity. No active exploitation confirmed in CISA KEV at time of analysis, and EPSS data not available for this 2026 CVE identifier.
Technical ContextAI
This vulnerability stems from improper file path validation (CWE-22: Path Traversal) in Lenovo's Personal Cloud Storage platform. Path traversal vulnerabilities occur when applications fail to properly sanitize user-supplied file path inputs, allowing attackers to use special characters (like ../ sequences) or absolute paths to access files outside their intended directory scope. In multi-tenant storage systems like Lenovo Personal Cloud, proper path validation is critical for maintaining isolation between different users' data stores. The affected CPE entries indicate this is a platform-wide issue affecting Lenovo's entire consumer NAS product line, including T-series (T1, T2, T2S, T2Pro), X-series (X1, X1S), A-series (A1, A1S), and Home Storage Hub models (T20, X20). The CVSS 4.0 vector shows network-accessible exploitation with low complexity and no user interaction required once authenticated.
RemediationAI
Users should immediately check Lenovo's official advisory at https://iknow.lenovo.com.cn/detail/440274 for firmware updates addressing this path traversal vulnerability. For devices receiving updates, apply the latest firmware version through the device's administrative interface following Lenovo's upgrade procedures. For the Personal Cloud T1 model, which has reached end-of-life status (https://pc.lenovo.com.cn/tips/Ann/t1_eol.html), no patch may be available; users should migrate data to supported models or alternative storage solutions. As interim mitigation until patches are applied: restrict user account creation to only trusted individuals, regularly audit user account lists and remove unnecessary accounts, implement strong unique passwords for all accounts to prevent credential compromise, monitor device access logs for unusual file access patterns, consider network segmentation to limit device accessibility to trusted networks only, and disable remote access features if not required. Each mitigation trades convenience for security: removing remote access eliminates legitimate external usage, account restrictions limit device utility in multi-user households, and log monitoring requires manual review effort.
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-30041
GHSA-m6vj-6h49-wg69