Code execution through undisclosed engine flaw
Published Jul 16, 2021 · Updated Aug 10, 2026
Remote code execution in Microsoft Malware Protection Engine before 1.1.18242.0 allows attackers to execute code via unspecified vectors. Microsoft has not published the affected parser, input format, or faulty operation. Exploitation requires user interaction but no prior privileges and can compromise confidentiality, integrity, and availability through code execution.
Summary
What happened
Remote code execution in Microsoft Malware Protection Engine before 1.1.18242.0 allows attackers to execute code via unspecified vectors. Microsoft has not published the affected parser, input format, or faulty operation. Exploitation requires user interaction but no prior privileges and can compromise confidentiality, integrity, and availability through code execution.
The record
- CVE
- CVE-2021-34464
- Published
- Jul 16, 2021
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Malware Protection Engine
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 16, 2021CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.0.0 <1.1.18242.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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