CVE-2012-0158VulnerabilityPublished 11/03/2021Updated 10/24/2026

CVE-2012-0158: Microsoft MSCOMCTL.OCX Remote Code Execution Vulnerability

Affects Microsoft MSCOMCTL.OCXSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 11/03/2021
KEV deadline: 05/03/2022
Ransomware: Used in ransomware campaigns
EPSS: 100.0% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2012-0158 (opens in a new tab)

Description

CVE-2012-0158 is a high-severity remote code execution vulnerability in Microsoft MSCOMCTL.OCX. Exploitation allows attackers to execute arbitrary code with the privileges of the current user, potentially leading to full system compromise. This vulnerability has been exploited in the wild and is known to have been used in ransomware campaigns.

Summary

Microsoft MSCOMCTL.OCX contains an unspecified remote code execution vulnerability identified as CVE-2012-0158. Successful exploitation enables an attacker to execute arbitrary code remotely under the context of the current user, potentially allowing complete control over the affected system. This vulnerability has been actively exploited in the wild and has been leveraged in ransomware attacks. No specific affected versions or patch information is provided in the available data.

Impact

An attacker who successfully exploits this vulnerability can execute arbitrary code remotely with the privileges of the current user, potentially leading to full system compromise. The vulnerability has been exploited in the wild and is associated with ransomware campaigns, indicating active threat and significant risk to affected systems.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is confirmed, users should apply any available security updates from Microsoft related to MSCOMCTL.OCX and follow vendor recommendations. Employing least privilege principles to limit user rights can reduce impact.

Weaknesses

CWE-94Code Injection (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 09:11:39 UTC

Weaknesses

References

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