CVE-2021-46873

WireGuard: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVE-2021-46873 is fixed in WireGuard on 1 platform by WireGuard 0.6.1 (version 0.6.1), released April 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.3

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0047

41st percentile

WireGuard, such as WireGuard 0.5.3 on Windows, does not fully account for the possibility that an adversary might be able to set a victim's system time to a future value, e.g., because unauthenticated NTP is used. This can lead to an outcome in which one static private key becomes permanently useless.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
WireGuard	0.6.1	WireGuard 0.6.1	Apr 10, 2026

Details

Published
January 29, 2023
Weakness
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2021-46873

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