What is CVE-2021-38420?

CVE-2021-38420 is a high-severity vulnerability in Delta Electronics Dialink, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2021-11-03.

How severe is CVE-2021-38420?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Delta Electronics Dialink

CVE-2021-38420

Delta Electronics DIALink versions 1.2.4.0 and prior default permissions give extensive permissions to low-privileged user accounts, which may allow an attacker to modify the installation directory and upload malicious files.

Published 2021-11-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (12.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Delta Electronics Dialink — versions All
Deltaww Dialink

Weakness classification (CWE)

References

us-cert.cisa.gov/ics/advisories/icsa-21-294-02 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38420?: CVE-2021-38420 is a high-severity vulnerability in Delta Electronics Dialink, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2021-11-03.
How severe is CVE-2021-38420?: High severity. CVSS v3 base score is 7.8 out of 10.