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TI-2026-20224 Aliases CVE-2026-25039

The application evaluate UNC path in workspace name

Priority HIGH 73CWE-40Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00415 36th percentileScored 2026-11-07
Fix Fixed parsec-cloud (Scille): 3.3.3-rc.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Scilleparsec-cloudbefore 3.3.3-rc.03.3.3-rc.0Patch availableCNA
  • parsec-cloud VendorScille Affected before 3.3.3-rc.0 Fixed in 3.3.3-rc.0 Patch available CNA

Remediation

  • Fix · CNA parsec-cloud (Scille) Fixed in 3.3.3-rc.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25039

References

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences