Local privilege escalation via Windows Installer
Published Feb 25, 2021 · Updated Aug 3, 2024
Windows Installer in Microsoft Windows releases before the February 2021 security updates allows local users to gain SYSTEM privileges. The flaw is in the installer elevation path, which mishandles a package operation and permits an unprivileged local user to execute code with elevated rights. Exploitation requires local access but no user interaction; successful exploitation can compromise confidentiality, integrity, and availability.
Summary
What happened
Windows Installer in Microsoft Windows releases before the February 2021 security updates allows local users to gain SYSTEM privileges. The flaw is in the installer elevation path, which mishandles a package operation and permits an unprivileged local user to execute code with elevated rights. Exploitation requires local access but no user interaction; successful exploitation can compromise confidentiality, integrity, and availability.
The record
- CVE
- CVE-2021-1727
- Published
- Feb 25, 2021
- Updated
- Aug 3, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-269, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 25, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record 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=10.0.0 <publication
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
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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