CVE-2006-3873

Heap-based buffer overflow in URLMON.DLL in Microsoft Internet Explorer 6 SP1 on Windows 2000 and XP SP1, with versions the MS06-042 patch before 20060912, allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long URL in a GZIP-encoded website that was the target of an HTTP redirect, due to an incomplete fix for CVE-2006-3869.

Published: 2006-09-12 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-3873 is rated Moderate Risk (60.9/100): CVSS High severity, with high exploitation likelihood (EPSS 46.23%, 98th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-3873

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-28 49.50% 46.23% -3.27%
2 2025-12-27 46.23% 49.50% +3.27%
3 2025-10-28 — 46.23% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-3873

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2006-3873

OS Trackers for CVE-2006-3873

vendor priority summary link
alpine — CVE-2006-3873: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-3873

Affected software / configurations for CVE-2006-3873

Vendor Product Version Raw CPE
microsoft ie 6.0 cpe:2.3:a:microsoft:ie:6.0:sp1:*:*:*:*:*:*
microsoft windows_2000 — cpe:2.3:o:microsoft:windows_2000:*:sp4:*:fr:*:*:*:*
microsoft windows_2003_server 64-bit cpe:2.3:o:microsoft:windows_2003_server:64-bit:*:*:*:*:*:*:*
microsoft windows_2003_server itanium cpe:2.3:o:microsoft:windows_2003_server:itanium:*:*:*:*:*:*:*
microsoft windows_2003_server r2 cpe:2.3:o:microsoft:windows_2003_server:r2:*:*:*:*:*:*:*
microsoft windows_2003_server sp1 cpe:2.3:o:microsoft:windows_2003_server:sp1:*:*:*:*:*:*:*
microsoft windows_2003_server sp1 cpe:2.3:o:microsoft:windows_2003_server:sp1:*:itanium:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:tablet_pc:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp2:tablet_pc:*:*:*:*:*

References for CVE-2006-3873

cvelogic Threat Intelligence