CVE-2021-44466

Name: CVE-2021-44466
Creator: NVD / NIST
Published: 2021-12-30T22:15:09.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2021-44466 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.3/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.40%

31.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions
Leap	Bitmask Riseup Vpn	0.21.6

References

https://www.tenable.com/security/research/tra-2021-58Patch, Third Party Advisory
https://www.tenable.com/security/research/tra-2021-58Patch, Third Party Advisory

Timeline

Published: Dec 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-44466?

How severe is CVE-2021-44466?

CVE-2021-44466 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2021-44466?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-44466?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST