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.
CVE-2020-25754
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 42% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EPSS
- 67.9%
- KEV
- Not listed
Published
June 16, 2021
Last Modified
November 21, 2024
References (6)
- cve@mitrehttps://enphase.com/en-us/products-and-services/envoy-and-combiner
- cve@mitrehttps://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a
- cve@mitrehttps://stage2sec.com
- af854a3a-2127-422b-91ae-364da2661108https://enphase.com/en-us/products-and-services/envoy-and-combiner
- af854a3a-2127-422b-91ae-364da2661108https://medium.com/stage-2-security/can-solar-controllers-be-used-to-generate-fake-clean-energy-credits-4a7322e7661a
- af854a3a-2127-422b-91ae-364da2661108https://stage2sec.com
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 41× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 08:25 UTCEPSS rescore
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- 2026-05-27 13:39 UTCEPSS rescore
- 2026-05-26 14:49 UTCEG score recompute
- 2026-05-26 14:48 UTCGHSA enrichment
- 2026-05-26 13:42 UTCEPSS rescore
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- 2026-05-26 07:17 UTCEPSS rescore
- 2026-05-26 07:17 UTCEPSS rescore
- 2026-05-24 22:12 UTCOSV refresh
- 2026-05-24 16:48 UTCEPSS rescore
Frequently asked(5)
What is CVE-2020-25754?
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What is the CVSS score of CVE-2020-25754?
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Dependency Blast Radius
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