CVE-2026-4543

Name: CVE-2026-4543
Creator: NVD / NIST
Published: 2026-03-22T10:16:07.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 3.38%

Last modified Jun 17, 2026

CVE-2026-4543 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. 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. EPSS estimates a 3.38% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS 4.0

2.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

3.38%

87.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wavlink	Wl-Wn578w2 Firmware	221110

References

https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.mdExploit, Third Party Advisory
https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_5/README.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.352360Permissions Required, VDB Entry
https://vuldb.com/?id.352360Third Party Advisory, VDB Entry
https://vuldb.com/?submit.774690Third Party Advisory, VDB Entry
https://vuldb.com/?submit.774691Third Party Advisory, VDB Entry

Timeline

Published: Mar 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4543?

How severe is CVE-2026-4543?

CVE-2026-4543 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 3.38% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4543?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4543?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST