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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.049 (91.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.055 · newest: 0.049 · change: -0.006
Affected products
- Wavlink Wl-Wn578w2 — versions 221110
- Wavlink Wl-Wn578w2 Firmware — versions 221110
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.md (related, Exploit, Third Party Advisory)
- github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_5/README.md (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.