CVE-2007-2223XML Core Services Memory Corruption
Microsoft XML Core Services (MSXML) 3.0 through 6.0 allows remote attackers to execute arbitrary code via the substringData method on a (1) TextNode or (2) XMLDOM object, which causes an integer overflow that leads to a buffer overflow.
Published Aug 14, 2007 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2007-2223 is a critical-severity vulnerability (CVSS 9.3 v2) affecting XML Core Services (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 49% 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 public exploit code exists for a high-severity flaw.
Scores
CVSS v2
9.3
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
49%
Higher than 98.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
48/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
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
0
Reports of active use
Advisories And Exploit References
- advisory26447
- advisoryoval:org.mitre.oval:def:2069
- advisoryVU#361968
- advisory20070814 ZDI-07-048: Microsoft Internet Explorer substringData() Heap Overflow Vulnerability
- advisory20070816 MS07-042 XMLDOM substringData() PoC
- advisory25301
Description
Microsoft XML Core Services (MSXML) 3.0 through 6.0 allows remote attackers to execute arbitrary code via the substringData method on a (1) TextNode or (2) XMLDOM object, which causes an integer overflow that leads to a buffer overflow.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| XML Core ServicesMicrosoft | 3.0, 4.0, 5.0, 6.0 | n/a |
Timeline
Publicly disclosed
Aug 14, 2007
Last updated
Apr 22, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-190 Integer Overflow or Wraparound
References
- advisory26447
- advisoryoval:org.mitre.oval:def:2069
- advisoryVU#361968
- advisory20070814 ZDI-07-048: Microsoft Internet Explorer substringData() Heap Overflow Vulnerability
- advisory20070816 MS07-042 XMLDOM substringData() PoC
FAQ
Common Questions.
Microsoft XML Core Services (MSXML) 3.0 through 6.0 allows remote attackers to execute arbitrary code via the substringData method on a (1) TextNode or (2) XMLDOM object, which causes an integer overflow that leads to a buffer overflow.
Affected: XML Core Services (Microsoft) versions 3.0, 4.0, 5.0, 6.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
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 public exploit code exists for a high-severity flaw.
Is CVE-2007-2223 On Your Attack Surface?
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