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Vulnerability record · CVE-2022-40622 · published 13 September 2022

CVE-2022-40622: Wavlink wn531g3 firmware improper authentication vulnerability

Wavlink · Wn531g3 Firmware

The WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 uses IP addresses to hold sessions and does not not use session tokens. Therefore, if an attacker changes their IP address to match the logged-in administrator's, or is behind the same NAT as the logged in administrator, session takeover is possible.

8.8 CVSS 3.1 High EPSS 0.74% · top 46.3% CWE-304 · CWE-304CWE-287 · Improper authentication
8.8CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 uses IP addresses to hold sessions and does not not use session tokens. Therefore, if an attacker changes their IP address to match the logged-in administrator's, or is behind the same NAT as the logged in administrator, session takeover is possible.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://youtu.be/cSileV8YbsQ?t=655 ExploitThird Party Advisory
https://youtu.be/cSileV8YbsQ?t=655 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2022-40623Wavlink wn531g3 firmware cross-site request forgery vulnerabilityThe WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 does not utilize anti-CSRF tokens, which, when combined with other issu…EPSS 0.69%7.5CVE-2022-40621Wavlink wn531g3 firmware authentication bypass by capture-replay vulnerabilityBecause the WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 and earlier communicates over HTTP and not HTTPS, and because t…EPSS 0.84%7.5CVE-2020-10972Wavlink wn530hg4 firmware missing authentication for critical function vulnerabilityAn issue was discovered where a page is exposed that has the current administrator password in cleartext in the source code of the page. No authentic…EPSS 1.8%7.5CVE-2020-10973Wavlink wn530hg4 firmware missing authentication for critical function vulnerabilityAn issue was discovered in Wavlink WN530HG4, Wavlink WN531G3, Wavlink WN533A8, and Wavlink WN551K1 affecting /cgi-bin/ExportAllSettings.sh where a cr…EPSS 7.6%7.5CVE-2020-12266Wavlink wl-wn579g3 firmware missing authentication for critical function vulnerabilityAn issue was discovered where there are multiple externally accessible pages that do not require any sort of authentication, and store system informa…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2022-40622), CISA KEV, FIRST EPSS (scores of 2026-10-17). This page is refreshed as NVD updates the record.