CVE-2012-10055 ComSndFTP v1.3.7 Beta USER Format String RCE

CriticalCVSS 9.3 EPSS 2.6% Framework module

Published: 2025-08-13 23:33
Updated: 2026-07-15 04:23
Exploit status: Public exploit available

Description

ComSndFTP FTP Server version 1.3.7 Beta contains a format string vulnerability in its handling of the USER command. By sending a specially crafted username containing format specifiers, a remote attacker can overwrite a hardcoded function pointer in memory (specifically WSACleanup from Ws2_32.dll). This allows the attacker to redirect execution flow and bypass DEP protections using a ROP chain, ultimately leading to arbitrary code execution. The vulnerability is exploitable without authentication and affects default configurations.

Affected products

Product	Affected versions	Fixed in
ComSndFTP FTP Server	= 1.3.7 Beta	No fix listed

References

CVSS v4.0

9.3 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable System Confidentiality: High
Vulnerable System Integrity: High
Vulnerable System Availability: High
Subsequent System Confidentiality: None
Subsequent System Integrity: None
Subsequent System Availability: None

All scores (2)

v4.0 9.3 · vulncheck
v4.0 9.3 · disclosure@vulncheck.com

Weakness & likelihood

EPSS (exploitation probability, 30 days): 2.56% (percentile 85.3)
CWE: CWE-134 Use of Externally-Controlled Format String

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

ComSndFTP v1.3.7 Beta USER Format String (Write4) Vulnerability Framework module · Metasploit Framework (Rapid7) · 2012-06-08