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 login to the router.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
www.huawei.com Huawei HG630 Router affected
Version Status Constraints
HG630 V2 affected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Wed, 13 May 2026 15:15:00 +0000

Type Values Removed Values Added
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 login to the router.
Title Huawei HG630 V2 Router Authentication Bypass via Serial Number
Weaknesses CWE-798
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-13T14:22:32.238Z

Reserved: 2026-05-13T13:49:58.352Z

Link: CVE-2020-37220

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-05-13T16:16:33.423

Modified: 2026-05-13T17:07:21.030

Link: CVE-2020-37220

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-13T17:15:26Z

Weaknesses