CVE-2022-40622

Administrator session takeover via IP address matching

Published Sep 13, 2022 · Updated Sep 16, 2024

Authentication bypass in Wavlink WL-WN531G3 M31G3.V5030.200325 allows remote attackers to hijack administrator sessions on a local network. The firmware's session manager keys authenticated state only to the client's IP address and does not issue a session token. Exploitation requires the attacker's address to match the administrator's address or share its NAT egress, granting access to the administrator session.

CVSS severity8.8
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Wavlink WL-WN531G3 M31G3.V5030.200325 allows remote attackers to hijack administrator sessions on a local network. The firmware's session manager keys authenticated state only to the client's IP address and does not issue a session token. Exploitation requires the attacker's address to match the administrator's address or share its NAT egress, granting access to the administrator session.

The record

CVE
CVE-2022-40622
Published
Sep 13, 2022
Updated
Sep 16, 2024
Vendor
Wavlink
Product
WAVLINK QUANTUM D4G (WL-WN531G3)
Classifications
CWE-287, CWE-304
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=M31G3.V5030.200325 <=M31G3.V5030.200325

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Wavlink · WAVLINK QUANTUM D4G (WL-WN531G3)version=M31G3.V5030.200325 <=M31G3.V5030.200325

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-304Missing Critical Step in Authentication

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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