How severe is CVE-2026-3704?

CVE-2026-3704 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-3704 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3704?

CVE-2026-3704 affects Wavlink Wl-nu516u1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3704?

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

Does CVE-2026-3704 have an EU (EUVD) identifier?

Yes. CVE-2026-3704 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10208.

When was CVE-2026-3704 published?

CVE-2026-3704 was published on 2026-03-08 and last updated on 2026-06-17.

CVE-2026-3704

CVE-2026-3704 is a medium-severity vulnerability in Wavlink Wl-nu516u1 Firmware with a CVSS 3.x base score of 4.7. 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-77.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
CVSS v2: 5.8
CVSS v4: 2.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10208
Weakness: CWE-77
Affected product: Wavlink Wl-nu516u1 Firmware
Published: 2026-03-08
Last modified: 2026-06-17

Description

A vulnerability has been found in Wavlink NU516U1 251208. This vulnerability affects the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. It is recommended to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Frequently asked questions

What is CVE-2026-3704?: A vulnerability has been found in Wavlink NU516U1 251208. This vulnerability affects the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. It is recommended to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.
How severe is CVE-2026-3704?: CVE-2026-3704 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-3704 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3704?: CVE-2026-3704 affects Wavlink Wl-nu516u1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3704?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3704 have an EU (EUVD) identifier?: Yes. CVE-2026-3704 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10208.
When was CVE-2026-3704 published?: CVE-2026-3704 was published on 2026-03-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:wavlink:wl-nu516u1_firmware:251208:*:*:*:*:*:*:*

More vulnerabilities in Wavlink Wl-nu516u1 Firmware

CVE-2026-3703 — Critical (CVSS 9.8): A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi.…
CVE-2026-4861 — High (CVSS 8.8): A weakness has been identified in Wavlink WL-NU516U1 260227. This vulnerability affects the function ftext of the file…
CVE-2026-3613 — High (CVSS 7.2): A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the…
CVE-2026-3612 — High (CVSS 7.2): A vulnerability was determined in Wavlink WL-NU516U1 V240425. This affects the function sub_405AF4 of the file…
CVE-2026-2615 — High (CVSS 7.2): A flaw has been found in Wavlink WL-NU516U1 up to 20251208. The affected element is the function…
CVE-2026-2567 — High (CVSS 7.2): A vulnerability was detected in Wavlink WL-NU516U1 20251208. This vulnerability affects the function sub_401218 of the…

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