What is CVE-2011-1985?

CVE-2011-1985 is a high-severity vulnerability in Microsoft Windows 2003 Server, classified under NULL Pointer Dereference. CVSS score: 7.1/10. Published 2011-10-12.

How severe is CVE-2011-1985?

High severity. CVSS v3 base score is 7.1 out of 10.

NULL pointer dereference in Microsoft Windows 2003 Server

CVE-2011-1985

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly validate user-mode input, which allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via a crafted application, aka "Win32k Null Pointer De-reference Vulnerability."

Published 2011-10-12 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.securitytracker.com/id (vdb-entry)
docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-077 (vendor-advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:12935 (signature, vdb-entry)

Frequently asked questions

What is CVE-2011-1985?: CVE-2011-1985 is a high-severity vulnerability in Microsoft Windows 2003 Server, classified under NULL Pointer Dereference. CVSS score: 7.1/10. Published 2011-10-12.
How severe is CVE-2011-1985?: High severity. CVSS v3 base score is 7.1 out of 10.