What is CVE-2026-13539?

CVE-2026-13539 is a high-severity vulnerability in Wavlink Wl-nu516u1-a, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-06-29.

How severe is CVE-2026-13539?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Wavlink Wl-nu516u1-a

CVE-2026-13539

A vulnerability was identified in Wavlink WL-NU516U1-A M16U1_V240425. The impacted element is the function sub_407504 of the file /cgi-bin/wireless.cgi of the component POST Parameter Handler. Such manipulation of the argument Guest_ssid l…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (37.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wavlink Wl-nu516u1-a — versions M16U1_V240425

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)
cna@vuldb.com (patch)

Frequently asked questions

What is CVE-2026-13539?: CVE-2026-13539 is a high-severity vulnerability in Wavlink Wl-nu516u1-a, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-06-29.
How severe is CVE-2026-13539?: High severity. CVSS v3 base score is 8.8 out of 10.