Medium severity · published Mar 22, 2026
CVE-2026-4543
Wavlink WL-WN578W2 POST Request firewall.cgi command injection
6.3
CVSS
5.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)5.6% · higher than 93% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-WN578W2 · Wavlink
221110 · source: vendor
WF
Wl-wn578w2 Firmware · Wavlink
221110 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4543
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4543
Exploit
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.md
Exploit
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_5/README.md
Permissions Required
https://vuldb.com/?ctiid.352360
Third Party Advisory
https://vuldb.com/?id.352360
Third Party Advisory
https://vuldb.com/?submit.774690
Third Party Advisory
https://vuldb.com/?submit.774691
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