CVE-2006-5559

EXPLOITED

Microsoft Data Access Components - Use-After-Free via ADODB.Connection Execute Method

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2006-5559 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 1 public exploit from researchers including YAG KOHHA.

AI-analyzed exploit summary This exploit triggers a denial-of-service (DoS) condition in Internet Explorer by causing an access violation via the 'ADODB.Connection' object's 'Execute' function. It leverages a large input string to overflow and crash the application.

Description

The Execute method in the ADODB.Connection 2.7 and 2.8 ActiveX control objects (ADODB.Connection.2.7 and ADODB.Connection.2.8) in the Microsoft Data Access Components (MDAC) 2.5 SP3, 2.7 SP1, 2.8, and 2.8 SP1 does not properly track freed memory when the second argument is a BSTR, which allows remote attackers to cause a denial of service (Internet Explorer crash) and possibly execute arbitrary code via certain strings in the second and third arguments.

Exploits (1)

exploitdb WORKING POC VERIFIED
by YAG KOHHA · htmldoswindows
https://www.exploit-db.com/exploits/2629

This exploit triggers a denial-of-service (DoS) condition in Internet Explorer by causing an access violation via the 'ADODB.Connection' object's 'Execute' function. It leverages a large input string to overflow and crash the application.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: Internet Explorer 6.0 on Windows XP SP1/SP2
No auth needed
Prerequisites: ActiveX enabled in Internet Explorer · Victim visits malicious webpage
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (12)

Core 12
Core References
Exploit, Patch vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/20704
Exploit, Patch, Vendor Advisory vdb-entry x_refsource_sectrack
http://securitytracker.com/id?1017127
Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A214
Vendor Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/22452
US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/cas/techalerts/TA07-044A.html
Patch, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/589272
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/29837
Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb
http://www.osvdb.org/31882
Vendor Advisory vdb-entry x_refsource_vupen
http://www.vupen.com/english/advisories/2007/0578

Scores

EPSS 0.7260
EPSS Percentile 98.8%

Details

VulnCheck KEV 2010-05-01
CWE
CWE-20
Status published
Products (3)
microsoft/data_access_components 2.5 sp3
microsoft/data_access_components 2.8 sp1 (2 CPE variants)
microsoft/data_access_components 2.7 sp1
Published Oct 27, 2006
Tracked Since Feb 18, 2026