CVE-2006-0021

Exp

Microsoft Windows XP SP1 and SP2, and Server 2003 up to SP1, allows remote attackers to cause a denial of service (hang) via an IGMP packet with an invalid IP option, aka the "IGMP v3 DoS Vulnerability."

Published: 2006-02-14 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-0021 is rated High Exploit Risk (84.5/100): CVSS High severity, with high exploitation likelihood (EPSS 69.66%, 99th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.84% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2006-0021

EDB-ID Source Kind Published Link
1603 exploit_db edb 2006-03-22 Exploit-DB ↗
1599 exploit_db edb 2006-03-21 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-0021

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 2025-06-27 65.82% 69.66% +3.84%
2 2025-03-30 69.57% 65.82% -3.75%
3 2025-03-29 — 69.57% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-0021

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2006-0021

Affected software / configurations for CVE-2006-0021

Vendor Product Version Raw CPE
microsoft windows_2003_server datacenter_64-bit cpe:2.3:o:microsoft:windows_2003_server:datacenter_64-bit:sp1:*:*:*:*:*:*
microsoft windows_2003_server enterprise cpe:2.3:o:microsoft:windows_2003_server:enterprise:*:64-bit:*:*:*:*:*
microsoft windows_2003_server enterprise cpe:2.3:o:microsoft:windows_2003_server:enterprise:sp1:*:*:*:*:*:*
microsoft windows_2003_server enterprise_64-bit cpe:2.3:o:microsoft:windows_2003_server:enterprise_64-bit:*:*:*:*:*:*:*
microsoft windows_2003_server r2 cpe:2.3:o:microsoft:windows_2003_server:r2:*:64-bit:*:*:*:*:*
microsoft windows_2003_server r2 cpe:2.3:o:microsoft:windows_2003_server:r2:*:datacenter_64-bit:*:*:*:*:*
microsoft windows_2003_server r2 cpe:2.3:o:microsoft:windows_2003_server:r2:sp1:*:*:*:*:*:*
microsoft windows_2003_server standard cpe:2.3:o:microsoft:windows_2003_server:standard:*:64-bit:*:*:*:*:*
microsoft windows_2003_server standard cpe:2.3:o:microsoft:windows_2003_server:standard:sp1:*:*:*:*:*:*
microsoft windows_2003_server standard_64-bit cpe:2.3:o:microsoft:windows_2003_server:standard_64-bit:*:*:*:*:*:*:*
microsoft windows_2003_server web cpe:2.3:o:microsoft:windows_2003_server:web:*:*:*:*:*:*:*
microsoft windows_2003_server web cpe:2.3:o:microsoft:windows_2003_server:web:sp1:*:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:64-bit:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:embedded:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:home:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:*:media_center:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:gold:professional:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:64-bit:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:embedded:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:home:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp1:media_center:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp2:home:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp2:media_center:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp2:tablet_pc:*:*:*:*:*

References for CVE-2006-0021

URL Tags
http://secunia.com/advisories/18853 Patch Vendor Advisory
http://securitytracker.com/id?1015629
http://www.kb.cert.org/vuls/id/839284 Third Party Advisory US Government Resource
http://www.securiteam.com/exploits/5PP0T0KI0O.html
http://www.securityfocus.com/archive/1/482658/30/4350/threaded
http://www.securityfocus.com/bid/16645 Patch
http://www.us-cert.gov/cas/techalerts/TA06-045A.html Third Party Advisory US Government Resource
http://www.vupen.com/english/advisories/2006/0576 Vendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-007
https://exchange.xforce.ibmcloud.com/vulnerabilities/24489
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1310
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1425
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1647
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1662
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A678
https://www.exploit-db.com/exploits/1599
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