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Vulnerability record · CVE-2020-37220 · published 13 May 2026

CVE-2020-37220: Hard-coded credentials vulnerability

Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to log in to the router.

8.7 CVSS 4.0 High EPSS 0.36% · top 73.2% CWE-798 · Hard-coded credentials Deferred
8.7CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

Huawei HG630 V2 router contains an authentication bypass vulnerability that allows unauthenticated attackers to obtain administrative access by retrieving the device serial number. Attackers can query the /api/system/deviceinfo endpoint without authentication to extract the SerialNumber field, then use the last 8 characters as the default password to log in to the router.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.exploit-db.com/exploits/48310
https://www.vulncheck.com/advisories/huawei-hg630-v2-router-authentication-bypass-via-serial-number
https://www.youtube.com/watch?v=vOrIL7L_cVc

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Source: NIST National Vulnerability Database (record CVE-2020-37220), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.