CVE-2002-0799

YoungZSoft CMailServer 3.30 - Remote Code Execution via Long USER Argument

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2002-0799. PoCs published by Over_G, anonymous.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in CMailServer's POP3 service via the USER command. It allows remote code execution by overwriting the return address and executing shellcode, with options for DoS or binding a shell on port 61200.

Description

Buffer overflow in YoungZSoft CMailServer 3.30 allows remote attackers to execute arbitrary code via a long USER argument.

Exploits (2)

exploitdb WORKING POC VERIFIED
by Over_G · cremotewindows
https://www.exploit-db.com/exploits/21467

This exploit targets a buffer overflow vulnerability in CMailServer's POP3 service via the USER command. It allows remote code execution by overwriting the return address and executing shellcode, with options for DoS or binding a shell on port 61200.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: CMailServer 4.0.2003.03.30
No auth needed
Prerequisites: Network access to the POP3 service (port 110) · Target running Windows 2000 SP3 English (or similar)
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by anonymous · cremotewindows
https://www.exploit-db.com/exploits/21466

This exploit targets a buffer overflow vulnerability in CMailServer 3.30 by sending a maliciously crafted USER argument to overwrite EIP and execute arbitrary shellcode. The payload binds a command shell to port 8008, demonstrating remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: CMailServer 3.30
No auth needed
Prerequisites: Network access to the vulnerable CMailServer instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Patch, Vendor Advisory vdb-entry x_refsource_xf
http://www.iss.net/security_center/static/9132.php
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://online.securityfocus.com/archive/1/273512
Exploit, Vendor Advisory vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/4789

Scores

EPSS 0.1432
EPSS Percentile 96.2%

Details

Status published
Products (1)
youngzsoft/cmailserver 3.30
Published Aug 12, 2002
Tracked Since Feb 18, 2026