CVE-2026-2567

Wavlink WL-NU516U1 nas.cgi sub_401218 stack-based overflow

A vulnerability was detected in Wavlink WL-NU516U1 20251208. This vulnerability affects the function sub_401218 of the file /cgi-bin/nas.cgi. Performing a manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

Affected

Wavlink · WL-NU516U1

CVSS v4.0 VULDB

7.3 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 VULDB

8.3 HIGHAV:N/AC:L/Au:M/C:C/I:C/A:C

EPSS

1.25% chance of exploitation in the next 30 days, 69th percentile

Published

2026-02-16

Updated

2026-02-23

Proof-of-concept exploits (1)

• Wlz1112/Wavlink-NU516U1-V251208-/blob/main/nas.cgi_User1Passwd.md

Security advisories

• https://vuldb.com/?id.346174
• https://vuldb.com/?submit.752016

References

• CVE Record
• NVD entry

Related

• CVE-2026-101187
• CVE-2026-2565
• CVE-2026-2566
• CVE-2026-2615
• CVE-2026-3612
• CVE-2026-3613