CVE-2026-74843 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-74843CRITICAL

Wavlink WN531P3/WN535M1 Export Pingortrace CGI export_pingortrace.cgi strcpy stack-based overflow

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   H    9.3   .0097   59.1     —

AFFECTED
  Product  Versions   Fixed
  WN531P3  V250922 –  —
  WN535M1  V250922 –  —

TIMELINE
  Aug 16  EXPLOIT PUBLISHED — CVE-2026-74843 (Wavlink WN531P3). Public exploit reference added.
  Aug 17  Reserved by VulDB
  Aug 17  Published (CNA: VulDB)

CWE-121, CWE-119 · CNA: VulDB · CVSS v4.0 · 5 references · NVD status: Received

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 16, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-74843 (Wavlink WN531P3). Public exploit reference added.
August 17, 2026	Reserved	Reserved by VulDB
August 17, 2026	Published	Published (CNA: VulDB)

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Wavlink	WN531P3	—	V250922	—
Wavlink	WN535M1	—	V250922	—

Weaknesses

CWE-121 · CWE-119

References (5)

https://github.com/wcndsb-sketch/WAVLINK_WN535M1-M35M1_V250922-Buffer-Overflow/blob/main/CVE-Report-WAVLINK-WN535M1-RCE.pdf [exploit]
https://vuldb.com/cve/CVE-2026-74843 [third-party-advisory]
https://vuldb.com/submit/875331 [third-party-advisory]
https://vuldb.com/vuln/391205 [vdb-entry, technical-description]
https://vuldb.com/vuln/391205/cti [signature, permissions-required]

Authoritative record: CVE-2026-74843 at cve.org

Vendors: wavlink

Weaknesses: CWE-121 · CWE-119

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-74843 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.