CVE-2007-4903

Ultra Crypto Component <= 2.0 - Remote Code Execution via CryptoX.dll ActiveX Buffer Overflow

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-4903. PoCs published by shinnai.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in Ultra Crypto Component (CryptoX.dll <= 2.0) via the 'AcquireContext()' method. It uses heap spraying to achieve remote code execution by overwriting memory with shellcode.

Description

Multiple buffer overflows in a certain ActiveX control in CryptoX.dll 2.0 and earlier in the Ultra Crypto Component allow remote attackers to execute arbitrary code via (1) a long string in the first argument to the AcquireContext method or (2) an unspecified vector to the DeleteContext method.

Exploits (1)

exploitdb WORKING POC VERIFIED

by shinnai · htmlremotewindows

https://www.exploit-db.com/exploits/4389

View Code ZIP pw:eip

This exploit targets a buffer overflow vulnerability in Ultra Crypto Component (CryptoX.dll <= 2.0) via the 'AcquireContext()' method. It uses heap spraying to achieve remote code execution by overwriting memory with shellcode.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: Ultra Crypto Component (CryptoX.dll <= 2.0)

No auth needed

Prerequisites: Victim must visit a malicious webpage or open a malicious HTML file · Target system must have the vulnerable CryptoX.dll component installed

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1059 - Command and Scripting Interpreter

devstral-2 · analyzed Feb 16, 2026 Full analysis →