Local privilege escalation via undisclosed installer flaw
Published Jul 14, 2021 · Updated Aug 10, 2026
Improper privilege management in Windows Installer on affected Microsoft Windows builds allows local users to elevate privileges. Microsoft has not published the affected installer code path or the incorrect operation it performs on attacker-controlled input. An attacker must already have low-privileged local access; successful exploitation grants higher permissions on the same system.
Summary
What happened
Improper privilege management in Windows Installer on affected Microsoft Windows builds allows local users to elevate privileges. Microsoft has not published the affected installer code path or the incorrect operation it performs on attacker-controlled input. An attacker must already have low-privileged local access; successful exploitation grants higher permissions on the same system.
The record
- CVE
- CVE-2021-34511
- Published
- Jul 14, 2021
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-269, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 14, 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=10.0.10240.0 <10.0.10240.19003
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.
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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