CVE-2007-4902

Ultra Crypto Component <= 2.0 - Arbitrary File Write via CryptoX.dll SaveToFile Method

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2007-4902. PoCs published by shinnai.

AI-analyzed exploit summary This exploit leverages an insecure method in Ultra Crypto Component (CryptoX.dll <= 2.0) to write arbitrary files via the 'SaveToFile()' method. It uses the 'HexString()' method to convert a command into hexadecimal format and save it as a batch file, demonstrating arbitrary command execution.

Description

Absolute path traversal vulnerability in a certain ActiveX control in CryptoX.dll 2.0 and earlier in the Ultra Crypto Component allows remote attackers to write to arbitrary files via a full pathname in the argument to the SaveToFile method.

Exploits (1)

exploitdb WORKING POC VERIFIED
by shinnai · htmlremotewindows
https://www.exploit-db.com/exploits/4388

This exploit leverages an insecure method in Ultra Crypto Component (CryptoX.dll <= 2.0) to write arbitrary files via the 'SaveToFile()' method. It uses the 'HexString()' method to convert a command into hexadecimal format and save it as a batch file, demonstrating arbitrary command execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Ultra Crypto Component (CryptoX.dll <= 2.0)
No auth needed
Prerequisites: Victim must open the HTML file in a browser with the vulnerable component installed
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (5)

Core 5
Core References
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/25611
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/36522
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://osvdb.org/38982
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/4388
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id?1018675

Scores

EPSS 0.0561
EPSS Percentile 91.9%

Details

CWE
CWE-22
Status published
Products (1)
ultra_shareware/ultra_crypto_component 2.0.2007.801
Published Sep 17, 2007
Tracked Since Feb 18, 2026