How severe is CVE-2025-47812?

CVE-2025-47812 has a CVSS score of 10/10, rated CRITICAL. Immediate patching is strongly recommended.

Which products are affected by CVE-2025-47812?

Affected package information for CVE-2025-47812 is not yet fully mapped. Check the official advisory links for details.

How do I patch CVE-2025-47812?

Apply the wftpserver wing ftp server security patch or hotfix for CVE-2025-47812 on the affected version, following the vendor advisory for your exact build.

How do I detect CVE-2025-47812 across my infrastructure?

Inventory every wftpserver wing ftp server deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.

How do I mitigate CVE-2025-47812 if there is no patch (or I can't update yet)?

Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.

How does O3 Security protect against CVE-2025-47812?

O3 detects and blocks CVE-2025-47812 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Is CVE-2025-47812 actively exploited in the wild?

Yes. There are 4 known exploit references for CVE-2025-47812, including 1 documented proof-of-concept exploit on Exploit-DB. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2025-47812?

CVE-2025-47812 has an EPSS (Exploit Prediction Scoring System) score of 95.3%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2025-47812 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-47812 (Wing FTP Server Improper Neutralization of Null Byte or NUL Character Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-07-14. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-08-04. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2025-47812?

CVE-2025-47812 is classified as CWE-158 (CWE-158). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2025-47812?

CVE-2025-47812 affects wftpserver wing ftp server. Check the affected-products list on this page against your deployed version to confirm exposure.

Is there exploit tooling available for CVE-2025-47812?

A Nuclei detection template exists for CVE-2025-47812, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2025-47812 published, and has it been updated?

CVE-2025-47812 was published on July 10, 2025 and was last updated on June 17, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2025-07-14 — agencies required to remediate by 2025-08-04

CVE-2025-47812

CRITICAL

In Wing FTP Server before 7.4.4. the user and admin web interfaces mishandle '\0' bytes, ultimately allowing injection of arbitrary Lua code into user session files. This can be used…

Published

Jul 10, 2025

Updated

Jun 17, 2026

Affected

0 pkgs

Patched

None yet

Exploits

4 known

EPSS Exploitation Probability

via FIRST.org ↗

95.3%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

In Wing FTP Server before 7.4.4. the user and admin web interfaces mishandle '\0' bytes, ultimately allowing 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). This is thus a remote code execution vulnerability that guarantees a total server compromise. This is also exploitable via anonymous FTP accounts.

Affected Products

1 product · 1 configurations

Application

wing ftp serverwftpserver

< 7.4.4

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-52347remotemultiple

Wing FTP Server 7.4.3 - Unauthenticated Remote Code Execution (RCE)

by 4m3rr0r · Jul 2, 2025

Exploit-DB Source

Detection & mitigation playbook

Vendor / appliance

Detect
Inventory every wftpserver wing ftp server deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Fix
Apply the wftpserver wing ftp server security patch or hotfix for CVE-2025-47812 on the affected version, following the vendor advisory for your exact build.
Workarounds
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2025-47812 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.

Tailored to CVE-2025-47812. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

O3 Security · Runtime Protection

Is CVE-2025-47812 being exploited in your environment?

O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2025-47812 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.

Protect my workloads How runtime protection works