What’s Vulnerable › Vulnerabilities

CVE-2026-2565: Wavlink WL-NU516U1 adm.cgi sub_40785C stack-based overflow

• Severity: medium (CVSS 6.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-16 · updated 2026-06-17
• Weakness: CWE-119

Description

A weakness has been identified in Wavlink WL-NU516U1 20251208. Affected by this issue is the function sub_40785C of the file /cgi-bin/adm.cgi. This manipulation of the argument time_zone causes stack-based buffer overflow. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Wavlink NU516U1: through 2025-12-08

References

• https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/time_zone.md
• https://vuldb.com/?ctiid.346172
• https://vuldb.com/?id.346172
• https://vuldb.com/?submit.751133

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