by Kastro
Paper/Archive/CVE-2026-18589

CVE-2026-18589

Wavlink WL-NU516U1 — Wavlink WL-NU516U1 nas.cgi change_password stack-based overflow

EPSS 1%CVSS 9.8
critical.is priorityof 100
43
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 65.6.656 × 2013.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Affected

ProductAffectedFixed inSource
WL-NU516U1708c073-mt7628–CNA

Scores by source

VulDB (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
VulDB (CNA)9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
VulDB (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

writeupvuldb.com/vuln/385417refvuldb.com/vuln/385417/ctiwriteupvuldb.com/cve/CVE-2026-18589writeupvuldb.com/submit/850501refgithub.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report2.mdpatchdl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-07-13-4b8a21f-mt7628-squashfs-sysupgrade.bin