Authenticated remote code execution
Published Jul 16, 2021 · Updated Aug 10, 2026
Remote code execution in Microsoft SharePoint Server 2019 and earlier allows remote authenticated users to execute arbitrary code over the network. Microsoft has not published the vulnerable component or the specific operation that mishandles attacker-controlled input for CVE-2021-34467. Exploitation requires low-privilege SharePoint authentication and can compromise confidentiality and integrity with limited service availability impact.
Summary
What happened
Remote code execution in Microsoft SharePoint Server 2019 and earlier allows remote authenticated users to execute arbitrary code over the network. Microsoft has not published the vulnerable component or the specific operation that mishandles attacker-controlled input for CVE-2021-34467. Exploitation requires low-privilege SharePoint authentication and can compromise confidentiality and integrity with limited service availability impact.
The record
- CVE
- CVE-2021-34467
- Published
- Jul 16, 2021
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Foundation 2013
- Classifications
- T1210
- Attack vector
- network
- Privileges
- authenticated
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=15.0.0 <15.0.5363.1000
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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