CVE-2026-13539

HIGH

Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow

Title source: cna
STIX 2.1

Description

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 leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used. It is suggested 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.

References (6)

Core 6
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-374547 | Wavlink WL-NU516U1-A POST Parameter wireless.cgi sub_407504 stack-based overflow
https://vuldb.com/vuln/374547
Signature, Permissions Required signature permissions-required
VDB-374547 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/374547/cti
Third Party Advisory third-party-advisory
CVE-2026-13539 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-13539
Third Party Advisory third-party-advisory
Submit #834024 | Wavlink WL-NU516U1-A M16U1_V240425 Buffer Overflow
https://vuldb.com/submit/834024

Scores

CVSS v3 8.8
EPSS 0.0047
EPSS Percentile 37.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-119 CWE-121
Status published
Products (1)
Wavlink/WL-NU516U1-A M16U1_V240425
Published Jun 29, 2026
Tracked Since Jun 29, 2026