CVE-2026-25039
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
Vulnerability in the Parsec file-sharing application: lack of workspace name sanitization allows using a UNC path. If the name is a UNC path, the application may become unresponsive or leak the NTLM hash.
Risk Assessment
An attacker could exploit this to capture the NTLM hash, potentially leading to pass-the-hash attacks and further compromise of the Windows system.
Recommendation
Update Parsec to a version containing the fix. Temporarily avoid using workspace names containing `\` characters.
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Original NVD description (English source)
Parsec is a cloud-based application for simple and cryptographically secure file sharing. The application does not sanitize the workspace name, creating a vulnerability if that workspace name is a UNC path. When creating mountpoint in the windows filesystem to mount the workspace of an organization, the application does not sanitize the workspace name. The cause issue if the workspace name evaluate to a UNC path since it's allowed for the name to containt `\` char. If the UNC path is invalid (or the targeted resource is not available) the application become unresponsive otherwise the system will interact with the mounted UNC path allowing the attacker to retrieve to [`NTLM`] hash.