What is CVE-2012-0157?

CVE-2012-0157 is a high-severity vulnerability in Microsoft Windows 7, classified under Improper Input Validation. CVSS score: 8.4/10. Published 2012-03-13.

How severe is CVE-2012-0157?

High severity. CVSS v3 base score is 8.4 out of 10.

Improper input validation in Microsoft Windows 7

CVE-2012-0157

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 handle window messaging, which allows local users to gain privileges via a crafted application that calls the PostMessage function, aka "PostMessage Function Vulnerability."

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2012-03-13 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (72.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.us-cert.gov/cas/techalerts/TA12-073A.html (US Government Resource, third-party-advisory)
docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-018 (vendor-advisory)
oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:14217 (signature, vdb-entry)
osvdb.org/80002 (vdb-entry)

Frequently asked questions

What is CVE-2012-0157?: CVE-2012-0157 is a high-severity vulnerability in Microsoft Windows 7, classified under Improper Input Validation. CVSS score: 8.4/10. Published 2012-03-13.
How severe is CVE-2012-0157?: High severity. CVSS v3 base score is 8.4 out of 10.