Vulnerability Report

CVE-2009-2516

Title: Microsoft Windows 2000 Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2009-2516.

CWE Category CWE-476

Published Date Oct 14, 2009

Modified Date Jun 16, 2026

Exploit Status Not Found

Score 7.1 CVSS v3.1

Exploit Probability (EPSS)

1.33%

Vulnerability Summary

CVE-2009-2516: The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly validate data sent from user mode, which allows local users to gain privileges via a crafted PE .exe file that triggers a NULL pointer dereference during chain traversal, aka "Windows Kernel NULL Pointer Dereference Vulnerability."

Impacted Vendors

microsoft 5

Reference Links

http://www.nsfocus.com/en/advisories/0903.html http://www.us-cert.gov/cas/techalerts/TA09-286A.html https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-058 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6264 http://www.nsfocus.com/en/advisories/0903.html http://www.us-cert.gov/cas/techalerts/TA09-286A.html https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-058 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6264

CVSS v3.1

Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0

Severity HIGH

7.1

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v2.0

Source Entity [email protected]

Severity MEDIUM

6.9

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:M/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2009-2516 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 16, 2026 MODIFIED

Vulnerability data updated via NVD.

April 09, 2025 MODIFIED

Vulnerability data or affected products updated.

October 14, 2009 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected Stack

No specific products linked.