CVE-2008-1440

Microsoft Windows XP SP2 and SP3, and Server 2003 SP1 and SP2, does not properly validate the option length field in Pragmatic General Multicast (PGM) packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted PGM packet, aka the "PGM Invalid Length Vulnerability."

Published: 2008-06-12 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2008-1440 is rated Moderate Risk (62.1/100): CVSS High severity, with high exploitation likelihood (EPSS 50.59%, 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-2008-1440

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 51.11% 50.59% -0.52%
2 2025-12-27 50.59% 51.11% +0.52%
3 2025-10-28 — 50.59% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2008-1440

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 2.0 HIGH
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 6.9 [email protected]

Weakness enumeration for CVE-2008-1440

Affected software / configurations for CVE-2008-1440

Vendor Product Version Raw CPE
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:*:sp1:*:*:*:*:*:*
microsoft windows_server_2003 — cpe:2.3:o:microsoft:windows_server_2003:-:sp2:*:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
microsoft windows_xp — cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*

References for CVE-2008-1440

URL Tags
http://secunia.com/advisories/30587 Broken Link Permissions Required Vendor Advisory
http://securitytracker.com/id?1020230 Broken Link Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/29508 Broken Link Patch Third Party Advisory VDB Entry
http://www.us-cert.gov/cas/techalerts/TA08-162B.html Broken Link Third Party Advisory US Government Resource
http://www.vupen.com/english/advisories/2008/1783 Broken Link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-036 Patch Vendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5473 Broken Link
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