CVE-2020-37220 Huawei HG630 V2 Router Authentication Bypass via Serial Number
Attackers can bypass authentication on Huawei HG630 V2 routers by using the device serial number as the admin password, gaining full control.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-37220?
CVE-2020-37220 is a high-severity vulnerability in www.huawei.com HG630 V2 Router, published on 13 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-798
Which versions are affected by CVE-2020-37220?
How do I fix CVE-2020-37220?
No fix has been published for CVE-2020-37220 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-37220 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-37220 exists.
Sources
Also known as GHSA-h3fj-fchj-5wrp.