All vulnerabilities
CVE-2026-110958

Wavlink WN530HG4B api.cgi heap-based overflow

Wavlink WN530HG4BNetwork & edge
Open in ThreatlineRecord JSON
CVSS
10.0Critical
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 15 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)1.10%Chance of exploitation activity in the next 30 days, higher than 65% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published15 Oct 2026Updated 15 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

A vulnerability was found in Wavlink WN530HG4B M30HG4B_V260724. The impacted element is an unknown function of the file api.cgi. The manipulation results in heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026-09-24-841a51c6d5_tclinux.bin is sufficient to resolve this issue. The affected component should be upgraded. The vendor confirms: "We confirm the finding, and it has already been addressed. In the current firmware the api=info&client=app handler no longer builds a shell command: the login script is now invoked through an argument vector (execvp) instead of system(), and the client address is length-limited and null-checked."

Text from CVE List

Affected versions 2

  • WN530HG4Baffected: M30HG4B_V260724CVE List
  • WN530HG4Bunaffected: 2026-09-24-841a51c6d5_tclinux.binCVE List

References 6