CVE-2025-47812Known exploitationPublic exploitNetwork attack vector

Remote code execution via null-byte Lua injection

Published Jul 10, 2025 · Updated Feb 26, 2026

Code injection in Wing FTP Server before 7.4.4 allows remote attackers to execute system commands through the user or admin web interface. loginok.html authenticates only the username prefix before a null byte but saves the complete value into a Lua session file that SessionModule.load executes. Access requires valid credentials or an enabled anonymous account, and commands run as the FTP service, which uses root or SYSTEM by default.

CVSS severity10.0
Critical
EPSS probability92.86%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Wing FTP Server before 7.4.4 allows remote attackers to execute system commands through the user or admin web interface. loginok.html authenticates only the username prefix before a null byte but saves the complete value into a Lua session file that SessionModule.load executes. Access requires valid credentials or an enabled anonymous account, and commands run as the FTP service, which uses root or SYSTEM by default.

The record

CVE
CVE-2025-47812
Published
Jul 10, 2025
Updated
Feb 26, 2026
Vendor
Wing Soft Technology
Product
Wing FTP Server
Classifications
CWE-158, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2025Exploitation reportedHuntress customer exploitation incident
  2. Jul 10, 2025CVE publishedPublication date reported by the CVE source.
  3. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <7.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wing Soft Technology · Wing FTP Serverversion=0 <7.4.4

Published CVSS scores

10.0MITRE CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsShadowserver observations through Sep 16, 2026. Gaps indicate unavailable data.
Sep 10, 2026Sep 16, 2026
View daily counts
Reporting dayUnique IPs
Sep 10, 20264
Sep 11, 20261
Sep 12, 2026Unavailable
Sep 13, 20261
Sep 14, 20261
Sep 15, 2026Unavailable
Sep 16, 20262
Latest reporting daySep 16, 2026
Latest daily unique IPs2
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-158Improper Neutralization of Null Byte or NUL Character
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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