Content spoofing through undisclosed Office flaw
Published Sep 15, 2021 · Updated Aug 10, 2026
Spoofing in Microsoft Office 2013 through 2019 and Microsoft 365 Apps allows remote authenticated users to alter displayed content. Microsoft has not disclosed the affected component or the operation that mishandles attacker-controlled input. Exploitation requires low-privileged access and victim interaction; the published assessment bounds impact to data exposure and limited content alteration, with no service interruption.
Summary
What happened
Spoofing in Microsoft Office 2013 through 2019 and Microsoft 365 Apps allows remote authenticated users to alter displayed content. Microsoft has not disclosed the affected component or the operation that mishandles attacker-controlled input. Exploitation requires low-privileged access and victim interaction; the published assessment bounds impact to data exposure and limited content alteration, with no service interruption.
The record
- CVE
- CVE-2021-38650
- Published
- Sep 15, 2021
- Updated
- Aug 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft Office 2016
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 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 <5215.1000
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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