CVE-2021-1492

7.1 highEPSS 0.3%

High (7.1) in duo authentication proxy. EPSS 0.3% chance of exploitation in the next 30 days.

The Duo Authentication Proxy installer prior to 5.2.1 did not properly validate file installation paths. This allows an attacker with local user privileges to coerce the installer to write to arbitrary privileged directories. If successful, an attacker can manipulate files used by Duo Authentication Proxy installer, cause Denial of Service (DoS) by deleting file(s), or replace system files to potentially achieve elevation of privileges. This is only exploitable during new installations, while the installer is running, and is not exploitable once installation has finished. Versions 5.2.1 of Duo Authentication Proxy installer addresses this issue.

Severity

CVSS 3.1

7.1 high

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
CWE: CWE-64
Published: 2021-03-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

duo:authentication_proxy

References

Check your stack JSON