CVE-2006-5559Data Access Components Vulnerability
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…
Published Oct 27, 2006 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2006-5559 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Data Access Components (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since May 1, 2010. Public exploit code is available.
- EPSS estimates a 44% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
44%
Higher than 98.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
43/100
Publication score, see How it works
Exploitation Verdict
KEV listed
May 1, 2010
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisory22452
- advisoryADV-2007-0578
- patchhttp://research.eeye.com/html/alerts/zeroday/20061027.html
- patch1017127
- patchVU#589272
- patch20704
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 1, 2010 | n/a | Not reported |
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Data Access ComponentsMicrosoft | 2.5-sp3, 2.7-sp1, 2.8, 2.8-sp1 | n/a |
Timeline
Publicly disclosed
Oct 27, 2006
Added to Industry KEV feed
May 1, 2010
Last updated
Apr 22, 2026
Weakness Type
- CWE-20 Improper Input Validation
References
- advisory22452
- advisoryADV-2007-0578
- patchresearch.eeye.com · 20061027.html
- patch1017127
- patchVU#589272
FAQ
Common Questions.
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 caus…
Affected: Data Access Components (Microsoft) versions 2.5-sp3, 2.7-sp1, 2.8, 2.8-sp1. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 1, 2010.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2006-5559 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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