How severe is CVE-2021-44259?

CVE-2021-44259 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-44259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44259?

CVE-2021-44259 affects Wavlink Wl-wn531g3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-44259?

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

When was CVE-2021-44259 published?

CVE-2021-44259 was published on 2022-03-17 and last updated on 2026-06-17.

CVE-2021-44259

CVE-2021-44259 is a critical-severity vulnerability in Wavlink Wl-wn531g3 Firmware with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Wavlink Wl-wn531g3 Firmware
Published: 2022-03-17
Last modified: 2026-06-17

Description

A vulnerability is in the 'wx.html' page of the WAVLINK AC1200, version WAVLINK-A42W-1.27.6-20180418, which can allow a remote attacker to access this page without any authentication. When an unauthorized user accesses this page directly, it connects to this device as a friend of the device owner.

Frequently asked questions

What is CVE-2021-44259?: A vulnerability is in the 'wx.html' page of the WAVLINK AC1200, version WAVLINK-A42W-1.27.6-20180418, which can allow a remote attacker to access this page without any authentication. When an unauthorized user accesses this page directly, it connects to this device as a friend of the device owner.
How severe is CVE-2021-44259?: CVE-2021-44259 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-44259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44259?: CVE-2021-44259 affects Wavlink Wl-wn531g3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-44259?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-44259 published?: CVE-2021-44259 was published on 2022-03-17 and last updated on 2026-06-17.

References

https://github.com/zer0yu/CVE_Request/blob/master/WAVLINK/WAVLINK_AC1200_unauthorized_access_vulnerability_second.md

Affected products (1)

cpe:2.3:o:wavlink:wl-wn531g3_firmware:a42w-1.27.6-20180418:*:*:*:*:*:*:*

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