CVE-2007-0217
CriticalPublic exploitThe wininet.dll FTP client code in Microsoft Internet Explorer 5.01 and 6 might allow remote attackers to execute arbitrary code via an FTP server response of a specific length that causes a terminating null byte to be written outside of a buffer, which causes heap corruption.
Published Feb 13, 2007 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2007-0217 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Ie (Microsoft), Internet Explorer (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 58% 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 very likely to be exploited soon.
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
58%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2007-0217 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
The wininet.dll FTP client code in Microsoft Internet Explorer 5.01 and 6 might allow remote attackers to execute arbitrary code via an FTP server response of a specific length that causes a terminating null byte to be written outside of a buffer, which causes heap corruption.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| IeMicrosoft | 6.0-sp1 | n/a |
| Internet ExplorerMicrosoft | 5.01-sp4, 6.0 | n/a |
Timeline
Publicly disclosed
Feb 13, 2007
Last updated
Apr 22, 2026
References
- exploitExploitDB-3444
- other20070213 Microsoft 'wininet.dll' FTP Reply Null Termination Heap Corruption Vulnerability
- otherMS07-016
- other24156
- otheroval:org.mitre.oval:def:1141
FAQ
Common Questions.
The wininet.dll FTP client code in Microsoft Internet Explorer 5.01 and 6 might allow remote attackers to execute arbitrary code via an FTP server response of a specific length that causes a terminating null byte to be written outside of a buffer, which causes heap corruption.
Affected: Ie (Microsoft) versions 6.0-sp1; Internet Explorer (Microsoft) versions 5.01-sp4, 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 it is very likely to be exploited soon.
Is CVE-2007-0217 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo