What is CVE-2020-25754?

CVE-2020-25754 is a high-severity vulnerability in Enphase Envoy, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.5/10. Published 2021-06-16.

How severe is CVE-2020-25754?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Enphase Envoy

CVE-2020-25754

An issue was discovered on Enphase Envoy R3.x and D4.x devices. There is a custom PAM module for user authentication that circumvents traditional user authentication. This module uses a password derived from the MD5 hash of the username and serial number. The serial number can be retrieved by an unauthenticated user at /info.xml. Attempts to change the user password via passwd or other tools have no effect.

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.013 (70.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 70.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: +0.000

Affected products

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

Weakness classification (CWE)

CWE-916 — Use of Password Hash With Insufficient Computational Effort

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-2020-25754?: CVE-2020-25754 is a high-severity vulnerability in Enphase Envoy, classified under Use of Password Hash With Insufficient Computational Effort. CVSS score: 7.5/10. Published 2021-06-16.
How severe is CVE-2020-25754?: High severity. CVSS v3 base score is 7.5 out of 10.