Authentication Bypass Weakness in Huawei HG630 V2 Router
CVE-2020-37220

8.7HIGH

Key Information:

Vendor

Www.huawei.com

Status
Huawei Hg630 Router
Vendor
CVE Published:
13 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-37220?

The Huawei HG630 V2 router is susceptible to an authentication bypass flaw that permits unauthenticated attackers to gain administrative control without proper credentials. This is achieved by accessing the device's /api/system/deviceinfo endpoint, which reveals the device's serial number. Malicious actors can exploit this information by leveraging the last eight digits of the serial number as a default password, thereby compromising the router's security and allowing unauthorized access to manage network settings.

Affected Version(s)

Huawei HG630 Router HG630 V2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-37220 - Proof of Concept

References

https://www.exploit-db.com/exploits/48310
exploit
https://www.youtube.com/watch?v=vOrIL7L_cVc
third-party-advisory
https://www.vulncheck.com/advisories/huawei-hg630-v2-rout...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eslam Medhat
.