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Description

A vulnerability was identified in Wavlink WL-NU516U1 V240425. This vulnerability affects the function sub_401A0C of the file /cgi-bin/login.cgi. Such manipulation of the argument ipaddr leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.

PUBLISHED Reserved 2026-03-05 | Published 2026-03-06 | Updated 2026-03-06 | Assigner VulDB




HIGH: 8.6CVSS: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
HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 7.2CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
8.3AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

V240425
affected

Timeline

2026-03-05:Advisory disclosed
2026-03-05:VulDB entry created
2026-03-05:VulDB entry last update

Credits

haimianbaobao (VulDB User) reporter

VulDB coordinator

References

vuldb.com/?id.349221 (VDB-349221 | Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow) vdb-entry technical-description

vuldb.com/?ctiid.349221 (VDB-349221 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.755341 (Submit #755341 | Wavlink NU516U1 V240425 Stack-based Buffer Overflow) third-party-advisory

github.com/...0425/blob/main/ipaddr_Stack Buffer Overflow.md exploit

cve.org (CVE-2026-3613)

nvd.nist.gov (CVE-2026-3613)

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