CVE-2026-13539CWE-119CWE-121

Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow

High · published June 29, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
57.9
In the wild
Unconfirmed
What it is

A vulnerability was identified in Wavlink WL-NU516U1-A M16U1_V240425. The impacted element is the function sub_407504 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. Such manipulation of the argument Guest_ssid leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
EPSS
0.00854 · 57.9th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-06-29T05:30Z
EPSS history
Timeline
  • 29 JUN 05:30Z
    Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow
    cvelistv5