CVE-2026-109107 Wavlink CVE debrief

Who should care

Defenders responsible for Wavlink WL-WN592AX6 devices, particularly those with version 250422, should assess exposure and prioritize verification of potential vulnerabilities. This includes operators, platform administrators, vulnerability management teams, and security teams who manage or monitor Wavlink WL-WN592AX6 devices. They should verify exposure, assess the network perimeter, and monitor for potential exploitation attempts.

Why it matters

Defenders should prioritize verifying exposure of Wavlink WL-WN592AX6 devices, particularly those with version 250422, and assess the network perimeter for potential vulnerabilities due to the existence of a null pointer dereference vulnerability in the main function of the /cgi-bin/upload.cgi file.

• Verify exposure of Wavlink WL-WN592AX6 devices
• Assess network perimeter for potential vulnerabilities
• Monitor for potential exploitation attempts

Technical summary

A null pointer dereference vulnerability exists in the main function of the /cgi-bin/upload.cgi file in Wavlink WL-WN592AX6 version 250422. The vulnerability can be exploited remotely by manipulating the Cookie argument. This issue affects Wavlink WL-WN592AX6 devices, particularly those with version 250422. Defenders should prioritize verifying exposure and assessing the network perimeter for potential vulnerabilities. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

Defensive priority

Defenders should prioritize verifying exposure of Wavlink WL-WN592AX6 devices, particularly those with version 250422, and assess the network perimeter for potential vulnerabilities.

Recommended defensive actions

• Verify exposure of Wavlink WL-WN592AX6 devices, particularly those with version 250422
• Assess the network perimeter for potential vulnerabilities
• Monitor for potential exploitation attempts
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE record and source item provide details about the vulnerability, including its existence in Wavlink WL-WN592AX6 version 250422 and the potential for remote attacks. Defenders should verify the exposure of Wavlink WL-WN592AX6 devices, particularly those with version 250422, and assess the network perimeter for potential vulnerabilities. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure. Evidence is limited, and defenders should exercise caution.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.