CVE-2020-37220 HIGH

CVE-2020-37220: Huawei HG630 V2 Router Authentication Bypass via Serial Number

Vendor Www.huawei.com
Product HG630 V2 Router
Weakness CWE-798 · Hardcoded credentials
Published May 13, 2026
Last update May 26, 2026

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 13, 2026 CVE published
May 26, 2026 Record updated

Related vulnerabilities

04Related CVE