High severity · published Mar 6, 2026
CVE-2026-3613
Wavlink WL-NU516U1 login.cgi sub_401A0C stack-based overflow
7.2
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WL
WL-NU516U1 · Wavlink
V240425 · source: vendor
WF
Wl-nu516u1 Firmware · Wavlink
m16u1_v240425 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3613
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3613
Exploit
https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/ipaddr_Stack%20Buffer%20Overflow.md
Permissions Required
https://vuldb.com/?ctiid.349221
Third Party Advisory
https://vuldb.com/?id.349221
Third Party Advisory
https://vuldb.com/?submit.755341
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