How severe is CVE-2026-4543?

CVE-2026-4543 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-4543 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4543?

CVE-2026-4543 affects Wavlink Wl-wn578w2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4543?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4543 have an EU (EUVD) identifier?

Yes. CVE-2026-4543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14295.

When was CVE-2026-4543 published?

CVE-2026-4543 was published on 2026-03-22 and last updated on 2026-06-17.

CVE-2026-4543

CVE-2026-4543 is a medium-severity vulnerability in Wavlink Wl-wn578w2 Firmware with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14295
Weakness: CWE-74
Affected product: Wavlink Wl-wn578w2 Firmware
Published: 2026-03-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-4543?: CVE-2026-4543 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-4543 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4543?: CVE-2026-4543 affects Wavlink Wl-wn578w2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4543?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4543 have an EU (EUVD) identifier?: Yes. CVE-2026-4543 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14295.
When was CVE-2026-4543 published?: CVE-2026-4543 was published on 2026-03-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:wavlink:wl-wn578w2_firmware:221110:*:*:*:*:*:*:*

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CVE-2025-10359 — High (CVSS 7.3): A vulnerability was detected in Wavlink WL-WN578W2 221110. This impacts the function sub_404DBC of the file…
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