Authenticated spoofing through undisclosed mechanism
Published Aug 12, 2021 · Updated Aug 10, 2026
Spoofing in Microsoft SharePoint Server 2013, 2016, and 2019 allows remote authenticated users to cause unspecified impact over a network. Microsoft has not published the affected component or the operation that mishandles untrusted input. Microsoft’s assessment requires low-privileged access and user interaction and bounds the effect to confidentiality and integrity, without service interruption.
Summary
What happened
Spoofing in Microsoft SharePoint Server 2013, 2016, and 2019 allows remote authenticated users to cause unspecified impact over a network. Microsoft has not published the affected component or the operation that mishandles untrusted input. Microsoft’s assessment requires low-privileged access and user interaction and bounds the effect to confidentiality and integrity, without service interruption.
The record
- CVE
- CVE-2021-36940
- Published
- Aug 12, 2021
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft SharePoint Enterprise Server 2016
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 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=16.0.0 <16.0.5200.1000
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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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