PT-2026-53214 · Wavlink · Wl-Nu516U1-A

Junegu · Published 2026-06-28 · Updated 2026-06-29 · CVE-2026-13539

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Wavlink WL-NU516U1-A version M16U1 V240425

Description A stack-based buffer overflow occurs in the POST Parameter Handler component when processing the Guest ssid argument. This issue exists within the sub 407504() function of the '/cgi-bin/wireless.cgi' endpoint and can be exploited remotely.

Recommendations Upgrade the affected component to the fixed version released by the vendor.

Exploit

Fix

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-119

Related Identifiers

CVE-2026-13539

Affected Products

Wl-Nu516U1-A

References · 11

• 🔥 https://github.com/Svigo-o/Wavlink_vul/tree/main/wavlink-wl-nu516u1-wireless-guestwifi-guestssid-buffer-overflow · Exploit
• https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-06-22-5ccde97-mt7628-squashfs-sysupgrade.bin · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-13539 · Security Note
• https://vuldb.com/vuln/374547 · Note
• https://vuldb.com/submit/834024 · Note
• https://vuldb.com/vuln/374547/cti · Note
• https://twitter.com/CVEnew/status/2071534123492037002 · Twitter Post
• https://vuldb.com/cve/CVE-2026-13539 · Note
• https://twitter.com/VulmonFeeds/status/2071520629258338671 · Twitter Post
• https://twitter.com/vuldb/status/2071176584242078174 · Twitter Post
• https://twitter.com/DFIR_Lab/status/2071505275551469944 · Twitter Post