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    CVE-2026-4543

    A vulnerability was found in Wavlink WL-WN578W2 221110. The impacted element is an unknown function of the file /cgi-bin/firewall.cgi of the component POST Request Handler. Performing a manipulation of the argument dmz_flag/del_flag results in command injection. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

    Published:Mar 22, 2026
    Last Modified:Apr 30, 2026
    EPS:Mar 22, 2026
    EPSS Score:0.00367
    CVSS Score:6.3

    Affected Products

    Vendor
    Wavlink
    Product
    Wl-wn578w2
    Vendor
    Wavlink
    Product
    Wl-wn578w2 Firmware

    Exploits

    https://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_4/README.mdhttps://github.com/Litengzheng/vul_db/blob/main/WL-WN578W2/vul_5/README.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-2026-4544 (CVSS 1.9) — A vulnerability was determined in Wavlink WL-WN578W2 221110. This affects an unknown function of the file /cgi…
    CVE-2026-4164 (CVSS 8.9) — A flaw has been found in Wavlink WL-WN578W2 221110. Impacted is the function Delete_Mac_list/SetName/GuestWifi…
    CVE-2025-10359 (CVSS 5.5) — A vulnerability was detected in Wavlink WL-WN578W2 221110. This impacts the function sub_404DBC of the file /c…
    CVE-2025-10358 (CVSS 5.5) — A security vulnerability has been detected in Wavlink WL-WN578W2 221110. This affects the function sub_404850 …
    CVE-2025-10325 (CVSS 2.1) — A vulnerability was identified in Wavlink WL-WN578W2 221110. This impacts the function sub_401340/sub_401BA4 o…
    CVE-2025-10324 (CVSS 5.5) — A vulnerability was determined in Wavlink WL-WN578W2 221110. This affects the function sub_401C5C of the file …
    CVE-2025-10323 (CVSS 5.5) — A vulnerability was found in Wavlink WL-WN578W2 221110. The impacted element is the function sub_409184 of the…
    CVE-2025-10322 (CVSS 5.5) — A vulnerability has been found in Wavlink WL-WN578W2 221110. The affected element is an unknown function of th…
    CVE-2025-10321 (CVSS 5.5) — A flaw has been found in Wavlink WL-WN578W2 221110. Impacted is an unknown function of the file /live_online.s…

    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