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    CVE-2026-3612

    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.

    Published:Mar 6, 2026
    Last Modified:Apr 16, 2026
    EPS:Mar 6, 2026
    EPSS Score:0.00389
    CVSS Score:7.2

    Affected Products

    Vendor
    Wavlink
    Product
    Wl-nu516u1
    Vendor
    Wavlink
    Product
    Wl-nu516u1 Firmware

    Exploits

    https://github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-105 HTTP Request Splitting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-15 Command Delimiters
    CAPEC-183 IMAP/SMTP Command Injection
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-248 Command Injection
    CAPEC-250 XML Injection
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-273 HTTP Response Smuggling
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-34 HTTP Response Splitting
    CAPEC-40 Manipulating Writeable Terminal Devices
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-51 Poison Web Service Registry
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-75 Manipulating Writeable Configuration Files
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-83 XPath Injection
    CAPEC-84 XQuery Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-18590 (CVSS 2.1) — A vulnerability was determined in Wavlink WL-NU516U1 708c073-mt7628. Affected is the function set_sys_adm of t…
    CVE-2026-18589 (CVSS 8.9) — A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of t…
    CVE-2026-18588 (CVSS 9.3) — A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the fi…
    CVE-2026-18587 (CVSS 6.8) — A flaw has been found in Wavlink WL-NU516U1 708c073-mt7628. The impacted element is an unknown function of the…
    CVE-2026-15513 (CVSS 2.1) — A security flaw has been discovered in Wavlink WL-NU516U1 260515. This affects the function wlink_uci_set_valu…
    CVE-2026-13538 (CVSS 2.1) — A vulnerability was determined in Wavlink WL-NU516U1-A M16U1_V240425. The affected element is the function sub…
    CVE-2026-8230 (CVSS 2.1) — A flaw has been found in Wavlink NU516U1 240425. The impacted element is the function sys_login1 of the file /…
    CVE-2026-8229 (CVSS 2.1) — A vulnerability was detected in Wavlink NU516U1 240425. The affected element is the function WifiBasic of the …
    CVE-2026-8228 (CVSS 2.1) — A security vulnerability has been detected in Wavlink NU516U1 240425. Impacted is the function advance of the …
    CVE-2026-8227 (CVSS 2.1) — A weakness has been identified in Wavlink NU516U1 240425. This issue affects the function wzdapMesh of the fil…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High