# CVE-2026-109107: Wavlink WL-WN592AX6 null pointer dereference in upload.cgi

Source: https://junglewise.ai/threats/cve-2026-109107-a-weakness-has-been-identified-in-wavlink-wl-wn592ax6-250422  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109107 · Severity: medium · CVSS 6.5 · Published 2026-10-13

Wavlink's WL-WN592AX6 wireless router contains a null pointer dereference vulnerability in its web-based file upload interface. An attacker can remotely trigger this flaw by sending a malicious Cookie header, causing the device to crash and become unavailable. This results in a denial of service, interrupting network connectivity for all users depending on the router.

Vendors: [Wavlink](https://junglewise.ai/threats/vendors/wavlink).

## Quick answers

**Is CVE-2026-109107 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109107 being exploited in the wild.

**How severe is CVE-2026-109107?** Medium severity, with a CVSS score of 6.5, published 13 October 2026.

**Which products and versions are affected?** Wavlink WL-WN592AX6 250422.

**Is there a fix for CVE-2026-109107?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-109107 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-109107?** Check whether you run Wavlink WL-WN592AX6 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A null pointer dereference vulnerability exists in the main function of /cgi-bin/upload.cgi, triggered by manipulation of the Cookie argument. The flaw is remotely exploitable without authentication or user interaction, allowing an attacker to crash the router process. Exploitation causes denial of service, and public exploit code is available.

## Affected products

- Wavlink WL-WN592AX6 250422

## Timeline

- 2026-10-13: disclosed

## References

- [https://vuldb.com/cve/CVE-2026-109107](https://vuldb.com/cve/CVE-2026-109107)
- [https://vuldb.com/submit/907371](https://vuldb.com/submit/907371)

## Related threats

- [Wavlink WL-WN592AX6 OS command injection in wmapd daemon](https://junglewise.ai/threats/cve-2026-109110-a-flaw-has-been-found-in-wavlink-wl-wn592ax6-250422-this-issue)