CVE-2009-4171

Yahoo! Messenger 9.0.0.2162 - Denial of Service via YahooBridgeLib.dll RegisterMe Method

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2009-4171. PoCs published by HACKATTACK.

AI-analyzed exploit summary This exploit leverages a buffer overflow vulnerability in the ActiveX control (clsid:58916BE6-BAFF-4F33-AEFE-B2AA03FE4C86) by passing an overly long string to the RegisterMe method, leading to remote code execution.

Description

An ActiveX control in YahooBridgeLib.dll for Yahoo! Messenger 9.0.0.2162, and possibly other 9.0 versions, allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) by calling the RegisterMe method with a long argument.

Exploits (2)

exploitdb WORKING POC VERIFIED
by HACKATTACK · textdoswindows
https://www.exploit-db.com/exploits/10092

This exploit leverages a buffer overflow vulnerability in the ActiveX control (clsid:58916BE6-BAFF-4F33-AEFE-B2AA03FE4C86) by passing an overly long string to the RegisterMe method, leading to remote code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Windows with vulnerable ActiveX control
No auth needed
Prerequisites: Vulnerable ActiveX control installed · Target system must execute the malicious XML file
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by HACKATTACK · xmldoswindows
https://www.exploit-db.com/exploits/33350

This exploit triggers a NULL-pointer dereference in Yahoo! Messenger's ActiveX control via a crafted VBScript call, leading to a denial-of-service (DoS) condition. The PoC uses an XML package with a VBScript job to pass an overly long string argument to the vulnerable method.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Yahoo! Messenger 9.0.0.2162
No auth needed
Prerequisites: Victim must open the malicious XML file in a context where ActiveX controls are executed (e.g., Internet Explorer)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry mailing-list x_refsource_bugtraq
http://www.securityfocus.com/archive/1/507818/100/0/threaded
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/54263
Exploit vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/37007

Scores

EPSS 0.0509
EPSS Percentile 91.3%

Details

CWE
CWE-119
Status published
Products (1)
yahoo/messenger 9.0.0.2162
Published Dec 02, 2009
Tracked Since Feb 18, 2026