PT-2026-8382 · Wavlink · Wavlink Wl-Nu516U1

Haimianbaobao · Published 2026-02-04 · Updated 2026-02-16 · CVE-2026-2567

Positive Technologies · (AI Summary)

CVSS v2.0

9.0

High

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

Name of the Vulnerable Software and Affected Versions Wavlink WL-NU516U1 version 20251208

Description A stack-based buffer overflow exists in the sub 401218 function of the /cgi-bin/nas.cgi file. The issue is triggered by manipulating the User1Passwd argument. This allows for remote attacks. A public exploit is available.

Recommendations Restrict access to the /cgi-bin/nas.cgi file. Avoid manipulating the User1Passwd argument. As a temporary workaround, consider restricting admin access.

Exploit

Fix

Buffer Overflow

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-121

CWE-787

Related Identifiers

BDU:2026-02351

CVE-2026-2567

Affected Products

Wavlink Wl-Nu516U1

References · 9

• 🔥 https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/nas.cgi_User1Passwd.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-2567 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2567 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02351 · Security Note
• https://vuldb.com/?submit.752016 · Note
• https://t.me/CVEtracker/44851 · Telegram Post
• https://vuldb.com/?id.346174 · Note
• https://vuldb.com/?ctiid.346174 · Note
• https://twitter.com/offseq/status/2023457413811061099 · Twitter Post