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Vulnerabilities

Vulnerability · CVE-2026-3661

A flaw has been found in Wavlink WL-NU516U1 240425.

Published Mar 7, 2026 · catalog updated Jun 17, 2026 · wl-nu516u1 firmware

Check this week

CVE-2026-3661 is not in CISA KEV. FIRST estimates a 11.34% chance of exploitation in the next 30 days. Check whether you run wl-nu516u1 firmware.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
11.34%
Remediation
Advisory link
Affected products
cpe wavlink/wl-nu516u1 firmware

A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe wavlink/wl-nu516u1 firmwarem16u1_v240425

How to fix CVE-2026-3661

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-3661 is not in CISA KEV. FIRST estimates a 11.34% chance of exploitation in the next 30 days. Check whether you run wl-nu516u1 firmware.

Which versions are affected?

Compare what you have installed with wavlink/wl-nu516u1 firmware m16u1_v240425. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-74: Injection; CWE-77: Command Injection. EPSS 11.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 7, 2026 · NIST NVD

    Detected

    A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

  2. Jun 17, 2026 · NIST NVD

    Updated

    A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Sources

  • CVE.orgVulnerability recordCVE-2026-3661

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3661

    30-day exploitation probability 11.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3661

    A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.