Vulnerability · Published Mar 22, 2026 · Assigned by VulDB

CVE-2026-4543Wavlink WL-WN578W2 POST Request firewall.cgi command injection

Medium 6.3

In plain English

A medium-severity command injection in WL-WN578W2 from Wavlink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 5.6% (higher than 93% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)5.6%top 7.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Wavlink	WL-WN578W2	221110

Weakness: CWE-77, CWE-74 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-352360 | Wavlink WL-WN578W2 POST Request firewall.cgi command injection vdb-entry, technical-description
VDB-352360 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #774690 | Wavlink WL-WN578W2 V221110 Command Injection third-party-advisory
Submit #774691 | Wavlink WL-WN578W2 V221110 Command Injection (Duplicate) third-party-advisory
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.md related
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_5/README.md exploit