Unrated severityNVD Advisory· Published Aug 3, 2026· Updated Aug 3, 2026
Wavlink WL-NU516U1 nas.cgi fgets stack-based overflow
CVE-2026-18588
Description
A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should 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.
Affected products
2- Range: 2026-07-13-4b8a21f
Patches
Vulnerability mechanics
References
6- dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.binmitrebroken-linkpatch
- vuldb.com/cve/CVE-2026-18588mitrethird-party-advisory
- vuldb.com/submit/850500mitrethird-party-advisory
- github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.mdmitrebroken-link
- vuldb.com/vuln/385416mitrevdb-entrytechnical-description
- vuldb.com/vuln/385416/ctimitresignaturepermissions-required
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