How severe is CVE-2020-37220?

CVE-2020-37220 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-37220 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2020-37220?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2020-37220 have an EU (EUVD) identifier?

Yes. CVE-2020-37220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-31221.

When was CVE-2020-37220 published?

CVE-2020-37220 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2020-37220

CVE-2020-37220 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-798.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2020-31221
Weakness: CWE-798
Published: 2026-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-37220?: 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.
How severe is CVE-2020-37220?: CVE-2020-37220 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-37220 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2020-37220?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2020-37220 have an EU (EUVD) identifier?: Yes. CVE-2020-37220 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-31221.
When was CVE-2020-37220 published?: CVE-2020-37220 was published on 2026-05-13 and last updated on 2026-06-17.

References

Other CWE-798 (Use of Hard-coded Credentials) vulnerabilities

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