Vulnerability · Published Apr 17, 2026 · Assigned by VulDB

CVE-2026-6483Wavlink WL-WN530H4 internet.cgi snprintf os command injection

High 7.2

In plain English

A high-severity OS command injection in WL-WN530H4 from Wavlink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 13.4% (higher than 96% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)13.4%top 3.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in Wavlink WL-WN530H4 20220721. This vulnerability affects the function strcat/snprintf of the file /cgi-bin/internet.cgi. The manipulation results in os command injection. It is possible to launch the attack remotely. The exploit has been made public and could be used. Upgrading to version 2026.04.16 is able to resolve this issue. Upgrading the affected component is recommended.

Affected products (as reported)

Vendor	Product	Versions
Wavlink	WL-WN530H4	20220721

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

References

VDB-358021 | Wavlink WL-WN530H4 internet.cgi snprintf os command injection vdb-entry, technical-description
VDB-358021 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #783055 | https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in- WN530H4 (AC1200 Dual-Band Wi-Fi Router) Firmware: WN530H4-WAVLINK_20220721 Improper Neutralization of Special Elements used in an OS Comman third-party-advisory
https://github.com/dxz0069/WAVLINK-WN530H4-Command-Injection-in-set_add_routing/blob/main/vuldb_submission_report.md exploit
https://dl.wavlink.com/firmware/RD/root_uImage_WN530H4-A_2026.04.16.bin patch