What is CVE-2026-4543?

CVE-2026-4543 is a medium-severity vulnerability in Wavlink Wl-Wn578w2, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-22.

How severe is CVE-2026-4543?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Wavlink Wl-Wn578w2

CVE-2026-4543

A vulnerability was found in Wavlink WL-WN578W2 221110. The impacted element is an unknown function of the file /cgi-bin/firewall.cgi of the component POST Request Handler. Performing a manipulation of the argument dmz_flag/del_flag results in command injection. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

EPSS: 0.040 (89.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Wavlink Wl-wn578w2 — versions 221110
Wavlink Wl-wn578w2_firmware — versions 221110

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (related, Exploit, Third Party Advisory)
cna@vuldb.com (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2026-4543?: CVE-2026-4543 is a medium-severity vulnerability in Wavlink Wl-Wn578w2, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-03-22.
How severe is CVE-2026-4543?: Medium severity. CVSS v3 base score is 6.3 out of 10.