Local privilege elevation through undisclosed Device Host flaw
Published Mar 11, 2021 · Updated Aug 19, 2026
Elevation of privilege in Microsoft Windows UPnP Device Host allows local users with low privileges to gain elevated execution. Microsoft has not published the faulty function, input, or operation within the UPnP Device Host, so the concrete mechanism remains undisclosed. Exploitation requires prior local code execution at low privilege and grants control at an elevated security context without user interaction.
Summary
What happened
Elevation of privilege in Microsoft Windows UPnP Device Host allows local users with low privileges to gain elevated execution. Microsoft has not published the faulty function, input, or operation within the UPnP Device Host, so the concrete mechanism remains undisclosed. Exploitation requires prior local code execution at low privilege and grants control at an elevated security context without user interaction.
The record
- CVE
- CVE-2021-26899
- Published
- Mar 11, 2021
- Updated
- Aug 19, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 11, 2021CVE publishedPublication date reported by the CVE source.
- Aug 19, 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 <10.0.10240.18874
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
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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