Local SYSTEM privilege escalation
Published Mar 11, 2021 · Updated Aug 19, 2026
Elevation of privilege in Microsoft Windows 10 WalletService allows local users to execute code with SYSTEM privileges. Microsoft has not published the affected code locus or the incorrect operation that WalletService performs on attacker-controlled input. Low-privileged local access is required, and successful exploitation grants full host control; ANSSI reports exploitation by APT31.
Summary
What happened
Elevation of privilege in Microsoft Windows 10 WalletService allows local users to execute code with SYSTEM privileges. Microsoft has not published the affected code locus or the incorrect operation that WalletService performs on attacker-controlled input. Low-privileged local access is required, and successful exploitation grants full host control; ANSSI reports exploitation by APT31.
The record
- CVE
- CVE-2021-26885
- 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?
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- 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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Reported exploitation
Technologies
Your stack
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Your stack
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