Vulnerability · Published Jan 29, 2023 · Assigned by mitre
CVE-2021-46873
Medium 5.3
In plain English
A medium-severity race condition in the wireguard package (Ubuntu). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 59.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | wireguard | no fix listed | UBUNTU-CVE-2021-46873 |
| Ubuntu:24.04:LTS | wireguard | no fix listed | UBUNTU-CVE-2021-46873 |
| Ubuntu:25.10 | wireguard | no fix listed | UBUNTU-CVE-2021-46873 |
| Ubuntu:26.04:LTS | wireguard | no fix listed | UBUNTU-CVE-2021-46873 |
| Ubuntu:26.10 | wireguard | no fix listed | UBUNTU-CVE-2021-46873 |
Affected products (as reported)
Weakness: CWE-362 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L