PT-2026-8378 · Wavlink · Wavlink Wl-Nu516U1

Haimianbaobao · Published 2026-02-04 · Updated 2026-02-16 · CVE-2026-2566

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 versions up to 130/260

Description A security issue exists in Wavlink WL-NU516U1. Manipulation of the firmware url argument within the sub 406194 function of the /cgi-bin/adm.cgi file can lead to a stack-based buffer overflow. This can be exploited remotely. The details of the exploit have been publicly disclosed. The vendor was informed of this issue but did not provide a response.

Recommendations Versions up to 130/260: Avoid using the firmware url parameter in the /cgi-bin/adm.cgi endpoint.

Exploit

Fix

Stack Overflow

Buffer Overflow

Weakness Enumeration

CWE-121

CWE-120

CWE-119

Related Identifiers

BDU:2026-02348

CVE-2026-2566

Affected Products

Wavlink Wl-Nu516U1

References · 10

• 🔥 https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/firmware_url.md · Exploit
• https://bdu.fstec.ru/vul/2026-02348 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-2566 · Security Note
• https://twitter.com/CVEnew/status/2023456489084530815 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2023482923568009532 · Twitter Post
• https://vuldb.com/?id.346173 · Note
• https://vuldb.com/?ctiid.346173 · Note
• https://vuldb.com/?submit.751908 · Note
• https://dbugs.ptsecurity.com/vulnerability/PT-2026-8378 · Note
• https://t.me/CVEtracker/44829 · Telegram Post