# CVE-2026-74843

## Summary

- **CVE ID:** CVE-2026-74843
- **Severity:** CRITICAL
- **CVSS Score:** 10 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P)
- **CWE:** CWE-121, CWE-119
- **Published:** Aug 17, 2026
- **Last Modified:** Aug 17, 2026

## Description

A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function strcpy of the file /etc/lighttpd/www/cgi-bin/export_pingortrace.cgi of the component Export Pingortrace CGI. Executing a manipulation of the argument HTTP_COOKIE can lead to stack-based buffer overflow. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.

## Affected Products

- Wavlink — WN531P3 (V250922)
- Wavlink — WN535M1 (V250922)

## References

- [CNA](https://vuldb.com/vuln/391205)
- [CNA](https://vuldb.com/vuln/391205/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-74843)
- [CNA](https://vuldb.com/submit/875331)
- [CNA](https://github.com/wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/blob/main/CVE-Report-WAVLINK-WN535M1-RCE.pdf)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.58%
- **EPSS Percentile:** 46.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._