Is CVE-2013-6999 being actively exploited?

CVE-2013-6999 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-6999?

CVE-2013-6999 has a CVSS 2.0 base score of 4.0 (MEDIUM).

CVE-2013-6999

MEDIUM · CVSS 4.0EPSS 2.0%EU EUVD

The IsHandleEntrySecure function in win32k.sys in the kernel-mode drivers in Microsoft Windows Server 2008 SP2 does not properly validate the tagPROCESSINFO pW32Job field, which allows local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted NtUserValidateHandleSecure call for an owned object. NOTE: the vendor reportedly disputes the significance of this report, stating that "it appears to be a local DOS ... we don't consider it a security vulnerability.

Key facts

CVSS score: 4.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:H/Au:N/C:N/I:N/A:C
EPSS score: 2.0% (80th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-6800)
Published: December 7, 2013
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-6800 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

microsoft / windows server 2008

References

http://pastebin.com/raw.php?i=we0ZSQC0(Exploit)
http://secunia.com/advisories/55633(Vendor Advisory)
http://www.securityfocus.com/bid/64057

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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