CVE-2026-4543

Wavlink WL-WN578W2 POST Request firewall.cgi command injection

MEDIUM
6.3
CVSS Score
Published: March 22, 2026 at 09:23 AM UTC
Updated: June 17, 2026 at 10:56 AM UTC
1 product affected across 1 vendorWl WN578W2 Firmware

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Severity
MEDIUM6.3
Exploit prediction
EPSS 6%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

wavlink-wl-wn578w2 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/?id.352360
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.352360
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.774690
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/?submit.774691
RelatedExploitThird Party Advisory
Source: cverecord
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.md

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77CWE-74

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