What is CVE-2021-37188?

CVE-2021-37188 is a high-severity vulnerability in Digi Transport Dr64, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2021-12-10.

How severe is CVE-2021-37188?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Digi Transport Dr64

CVE-2021-37188

An issue was discovered on Digi TransPort devices through 2021-07-21. An authenticated attacker may load customized firmware (because the bootloader does not verify that it is authentic), changing the behavior of the gateway.

Published 2021-12-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

www.digi.com/search/results (Vendor Advisory)
raw.githubusercontent.com/reidmefirst/vuln-disclosure/main/2021-04.txt (Third Party Advisory)

Frequently asked questions

What is CVE-2021-37188?: CVE-2021-37188 is a high-severity vulnerability in Digi Transport Dr64, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.8/10. Published 2021-12-10.
How severe is CVE-2021-37188?: High severity. CVSS v3 base score is 8.8 out of 10.