CVE-2026-4861CWE-119CWE-121

Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow

High · published March 26, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
65.4
In the wild
Unconfirmed
What it is

A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file /cgi-bin/nas.cgi. This manipulation of the argument Content-Length causes stack-based buffer overflow. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

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
0.01099 · 65.4th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-03-26T08:18Z
EPSS history
Timeline
  • 26 MAR 08:18Z
    Wavlink WL-NU516U1 nas.cgi ftext stack-based overflow
    cvelistv5