What is CVE-2020-25752?

CVE-2020-25752 is a medium-severity vulnerability in Enphase Envoy, classified under Use of Hard-coded Credentials. CVSS score: 5.3/10. Published 2021-06-16.

How severe is CVE-2020-25752?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Enphase Envoy

CVE-2020-25752

An issue was discovered on Enphase Envoy R3.x and D4.x devices. There are hardcoded web-panel login passwords for the installer and Enphase accounts. The passwords for these accounts are hardcoded values derived from the MD5 hash of the username and serial number mixed with some static strings. The serial number can be retrieved by an unauthenticated user at /info.xml. These passwords can be easily calculated by an attacker; users are unable to change these passwords.

Published 2021-06-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.016 (74.9th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Enphase Envoy
Enphase Envoy Firmware — versions d4.0, r3.0

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

enphase.com/en-us/products-and-services/envoy-and-combiner (Product, Vendor Advisory)
stage2sec.com (Third Party Advisory)
medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clea… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-25752?: CVE-2020-25752 is a medium-severity vulnerability in Enphase Envoy, classified under Use of Hard-coded Credentials. CVSS score: 5.3/10. Published 2021-06-16.
How severe is CVE-2020-25752?: Medium severity. CVSS v3 base score is 5.3 out of 10.