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Vulnerability record · CVE-2026-66050 · published 27 July 2026

CVE-2026-66050: Path traversal vulnerability

NitroShare Desktop through 0.3.4 contains a path traversal vulnerability in its LAN file transfer server that allows unauthenticated attackers on the same network to write arbitrary files by sending a crafted filename containing directory traversal sequences in the JSON item header name field. Attackers can exploit the lack of path validation to write files outside the transfer root directory to arbitrary locations the current user has write access, including the Windows Startup folder, enabling persistent code execution on the next user login.

8.7 CVSS 4.0 High EPSS 1.1% · top 35.3% CWE-22 · Path traversal Deferred
8.7CVSS 4.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
28 Jul 2026Last modified by NVD

Description

NitroShare Desktop through 0.3.4 contains a path traversal vulnerability in its LAN file transfer server that allows unauthenticated attackers on the same network to write arbitrary files by sending a crafted filename containing directory traversal sequences in the JSON item header name field. Attackers can exploit the lack of path validation to write files outside the transfer root directory to arbitrary locations the current user has write access, including the Windows Startup folder, enabling persistent code execution on the next user login.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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:

References

LinkTags
https://github.com/cduram/NotCVE-2026-0009
https://www.vulncheck.com/advisories/nitroshare-desktop-path-traversal-via-lan-file-transfer-server

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Source: NIST National Vulnerability Database (record CVE-2026-66050), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.