CVE-2025-47812: Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability
Wing FTP Server contains an improper neutralization of null byte or NUL character vulnerability that can allow injection of arbitrary Lua code into user session files. This can be used to execute arbitrary system commands with the privileges of the FTP service (root or SYSTEM by default).
| Vendor | Wing FTP Server |
|---|---|
| Product | Wing FTP Server |
| Date added to KEV | 2025-07-14 |
| Due date (BOD 22-01) | 2025-08-04 |
| Known ransomware campaign use | Unknown |
| CWE | CWE-158 |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
What to do
- Identify every instance of Wing FTP Server Wing FTP Server in your environment (asset inventory, EDR, vulnerability scanner).
- Apply CISA's required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Federal civilian agencies must act by 2025-08-04 under BOD 22-01; other organizations can use the same date as a target.
- Check the vendor advisory and NVD entry linked below for affected versions, then record the fix in your change log.
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Sources
- NVD entry for CVE-2025-47812 (severity scores, if any, live there)
- CISA KEV catalog entry
- https://www.wftpserver.com/serverhistory.htm
- https://nvd.nist.gov/vuln/detail/CVE-2025-47812