CVE-2006-3440
CVE-2006-3440 is a critical-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 62% places it in the 99th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Critical (CVSS 2.0 base score 10.0)
- EPSS exploit prediction: 62% (99th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Windows 2000
- Published:
- Last modified:
Description
Buffer overflow in the Winsock API in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 allows remote attackers to execute arbitrary code via unknown vectors, aka "Winsock Hostname Vulnerability."
Frequently asked questions
- What is CVE-2006-3440?
- Buffer overflow in the Winsock API in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 allows remote attackers to execute arbitrary code via unknown vectors, aka "Winsock Hostname Vulnerability."
- How severe is CVE-2006-3440?
- CVE-2006-3440 has a CVSS 2.0 base score of 10.0, rated critical severity.
- Is CVE-2006-3440 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 62% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2006-3440?
- CVE-2006-3440 primarily affects Microsoft Windows 2000. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2006-3440?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2006-3440 published?
- CVE-2006-3440 was published on 2006-08-09 and last updated on 2026-06-16.
References
- http://secunia.com/advisories/21394
- http://securitytracker.com/id?1016653
- http://www.kb.cert.org/vuls/id/908276
- http://www.securityfocus.com/bid/19319
- http://www.us-cert.gov/cas/techalerts/TA06-220A.html
- http://www.vupen.com/english/advisories/2006/3211
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-041
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A747
Affected products (7)
- cpe:2.3:o:microsoft:windows_2000:*:sp4:*:fr:*:*:*:*
- cpe:2.3:o:microsoft:windows_2003_server:64-bit:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_2003_server:sp1:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_2003_server:sp1:*:itanium:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:*:sp1:tablet_pc:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:*:sp2:tablet_pc:*:*:*:*:*
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