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 5% (92nd 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: 5% (92nd 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 5% (92nd 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:*:*:*:*:*:*:*

More vulnerabilities in Wavlink Wl-wn578w2 Firmware

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…
CVE-2025-10358 — High (CVSS 7.3): A security vulnerability has been detected in Wavlink WL-WN578W2 221110. This affects the function sub_404850 of the…
CVE-2025-10324 — High (CVSS 7.3): A vulnerability was determined in Wavlink WL-WN578W2 221110. This affects the function sub_401C5C of the file…
CVE-2025-10323 — High (CVSS 7.3): A vulnerability was found in Wavlink WL-WN578W2 221110. The impacted element is the function sub_409184 of the file…
CVE-2025-10325 — Medium (CVSS 6.3): A vulnerability was identified in Wavlink WL-WN578W2 221110. This impacts the function sub_401340/sub_401BA4 of the…
CVE-2025-10322 — Medium (CVSS 5.3): A vulnerability has been found in Wavlink WL-WN578W2 221110. The affected element is an unknown function of the file…

All CVEs affecting Wavlink Wl-wn578w2 Firmware →

Other CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities

CVE-2026-105135 — Critical (CVSS 10.0): A vulnerability has been found in InternLM MindSearch 0.1.0. This issue affects the function ExecutionAction.run of the…
CVE-2026-61732 — Critical (CVSS 10.0): Decepticon is an autonomous hacking agent for red teams. Versions prior to 1.1.17 wrap web crawl results — the output…
CVE-2026-94097 — Critical (CVSS 10.0): A vulnerability was determined in Netcore NBR200V2 1.3.241127.071246. This affects an unknown part of the file…
CVE-2026-20130 — Critical (CVSS 10.0): As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine…
CVE-2026-82971 — Critical (CVSS 10.0): A vulnerability was determined in QVidium Opera11 3.3.2a26-Ax4x-opera11. This affects an unknown part of the file…
CVE-2026-54159 — Critical (CVSS 10.0): PrestaShop ps_facetedsearch is a module that adds layered navigation filters. From 3.0.0 until 4.0.4, the…

Browse all CWE-74 (Improper Neutralization of Special Elements (Injection)) vulnerabilities →