CVE-2021-44466

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-30 · updated 2026-06-17
Weakness: CWE-732

Description

Bitmask Riseup VPN 0.21.6 contains a local privilege escalation flaw due to improper access controls. When the software is installed with a non-default installation directory off of the system root, the installer fails to properly set ACLs. This allows lower privileged users to replace the VPN executable with a malicious one. When a higher privileged user such as an Administrator launches that executable, it is possible for the lower privileged user to escalate to Administrator privileges.

Affected products

Bitmask Riseup VPN 0.21.6: 0.21.6

References

https://www.tenable.com/security/research/tra-2021-58
https://www.tenable.com/security/research/tra-2021-58

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