What’s Vulnerable › Vulnerabilities

CVE-2020-25754

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-16 · updated 2026-06-17
• Weakness: CWE-916

Description

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.

Affected products

• Enphase Envoy: d4.0, r3.0

References

• https://enphase.com/en-us/products-and-services/envoy-and-combiner
• https://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a
• https://stage2sec.com
• https://enphase.com/en-us/products-and-services/envoy-and-combiner
• https://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a
• https://stage2sec.com

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