High severity · published Mar 6, 2026
CVE-2026-3612
Wavlink WL-NU516U1 OTA Online Upgrade adm.cgi sub_405AF4 command injection
7.2
CVSS
13.2%
EPSS
No
On KEV
Description
A vulnerability was determined in Wavlink WL-NU516U1 V240425. This affects the function sub_405AF4 of the file /cgi-bin/adm.cgi of the component OTA Online Upgrade. This manipulation of the argument firmware_url causes command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. 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)13.2% · higher than 96% 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-2026-3612
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3612
Exploit
https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md
Permissions Required
https://vuldb.com/?ctiid.349220
Third Party Advisory
https://vuldb.com/?id.349220
Third Party Advisory
https://vuldb.com/?submit.754668
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