How severe is CVE-2020-12127?

CVE-2020-12127 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-2020-12127 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12127?

CVE-2020-12127 affects Wavlink Wn530h4 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12127?

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.

When was CVE-2020-12127 published?

CVE-2020-12127 was published on 2020-10-02 and last updated on 2026-06-17.

CVE-2020-12127

CVE-2020-12127 is a high-severity vulnerability in Wavlink Wn530h4 Firmware 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-306.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Wavlink Wn530h4 Firmware
Published: 2020-10-02
Last modified: 2026-06-17

Description

An information disclosure vulnerability in the /cgi-bin/ExportAllSettings.sh endpoint of the WAVLINK WN530H4 M30H4.V5030.190403 allows an attacker to leak router settings, including cleartext login details, DNS settings, and other sensitive information without authentication.

Frequently asked questions

What is CVE-2020-12127?: An information disclosure vulnerability in the /cgi-bin/ExportAllSettings.sh endpoint of the WAVLINK WN530H4 M30H4.V5030.190403 allows an attacker to leak router settings, including cleartext login details, DNS settings, and other sensitive information without authentication.
How severe is CVE-2020-12127?: CVE-2020-12127 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-2020-12127 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12127?: CVE-2020-12127 affects Wavlink Wn530h4 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12127?: 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.
When was CVE-2020-12127 published?: CVE-2020-12127 was published on 2020-10-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:wavlink:wn530h4_firmware:m30h4.v5030.190403:*:*:*:*:*:*:*

More vulnerabilities in Wavlink Wn530h4 Firmware

CVE-2022-35538 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 wireless.cgi has no filtering on parameters: delete_list,…
CVE-2022-35537 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 wireless.cgi has no filtering on parameters: mac_5g and Newname,…
CVE-2022-35536 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 qos.cgi has no filtering on parameters: qos_bandwith and qos_dat,…
CVE-2022-35535 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 wireless.cgi has no filtering on parameter macAddr, which leads to…
CVE-2022-35534 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 wireless.cgi has no filtering on parameter hiddenSSID32g and…
CVE-2022-35533 — Critical (CVSS 9.8): WAVLINK WN572HP3, WN533A8, WN530H4, WN535G3, WN531P3 qos.cgi has no filtering on parameters: cli_list and cli_num,…

All CVEs affecting Wavlink Wn530h4 Firmware →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

CVE-2026-63692 — Critical (CVSS 10.0): Dell Container Storage Modules, versions prior to 1.18.0, contain(s) a Missing Authentication for Critical Function…
CVE-2026-63688 — Critical (CVSS 10.0): Dell Container Storage Modules (CSM), versions prior to v1.18.0, contains a Missing Authentication for Critical…
CVE-2026-103956 — Critical (CVSS 10.0): Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed…
CVE-2026-53988 — Critical (CVSS 10.0): Dockhand before 1.0.40 contains an authentication bypass vulnerability in its git webhook endpoints that allows…
CVE-2026-85889 — Critical (CVSS 10.0): Missing authentication for critical function in Azure AI Foundry allows an unauthorized attacker to elevate privileges…
CVE-2026-92808 — Critical (CVSS 10.0): A server-side request forgery (SSRF) vulnerability exists in the UnifiedLogin service of Altium Enterprise Server. An…

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →