CVE-2021-31776

Name: CVE-2021-31776
Creator: NVD / NIST
Published: 2021-04-29T01:15:08.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2021-31776 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. Aviatrix VPN Client before 2.14.14 on Windows has an unquoted search path that enables local privilege escalation to the SYSTEM user, if the machine is misconfigured to allow unprivileged users to write to directories that are supposed to be restricted to administrators.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

Aviatrix VPN Client before 2.14.14 on Windows has an unquoted search path that enables local privilege escalation to the SYSTEM user, if the machine is misconfigured to allow unprivileged users to write to directories that are supposed to be restricted to administrators.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.31%

23.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-428

Affected Software

Vendor	Product	Versions
Aviatrix	Vpn Client	< 2.14.14

References

https://docs.aviatrix.com/Downloads/samlclient.htmlProduct, Vendor Advisory
https://docs.aviatrix.com/Downloads/samlclient.html#windows-winProduct, Vendor Advisory
https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelogRelease Notes, Vendor Advisory
https://docs.aviatrix.com/Downloads/samlclient.htmlProduct, Vendor Advisory
https://docs.aviatrix.com/Downloads/samlclient.html#windows-winProduct, Vendor Advisory
https://docs.aviatrix.com/HowTos/changelog.html#aviatrix-vpn-client-changelogRelease Notes, Vendor Advisory

Timeline

Published: Apr 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31776?

How severe is CVE-2021-31776?

CVE-2021-31776 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31776?

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-2021-31776?

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

Scan your code now

Source: NVD / NIST