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    CVE-2026-5020

    A vulnerability was detected in Totolink A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched remotely. The exploit is now public and may be used.

    Published:Mar 29, 2026
    Last Modified:Apr 1, 2026
    EPS:Mar 29, 2026
    EPSS Score:0.01168
    CVSS Score:6.3

    Affected Products

    Vendor
    Totolink
    Product
    A3600r
    Vendor
    Totolink
    Product
    A3600r Firmware

    Exploits

    https://lavender-bicycle-a5a.notion.site/TOTOLINK_A3600R_setNoticeCfg-32253a41781f80c197eaf8e7558c5ed1?source=copy_link

    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-2026-31027 (CVSS 9.8) — TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of…
    CVE-2026-1686 (CVSS 7.4) — A security flaw has been discovered in Totolink A3600R 5.9c.4959. This issue affects the function setAppEasyWi…
    CVE-2024-7187 (CVSS 8.7) — A vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. It has been declared as critical. This vu…
    CVE-2024-7186 (CVSS 8.7) — A vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. It has been classified as critical. This …
    CVE-2024-7185 (CVSS 8.7) — A vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102 and classified as critical. Affected by th…
    CVE-2024-7184 (CVSS 8.7) — A vulnerability has been found in TOTOLINK A3600R 4.1.2cu.5182_B20201102 and classified as critical. Affected …
    CVE-2024-7183 (CVSS 8.7) — A vulnerability, which was classified as critical, was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. Affect…
    CVE-2024-7182 (CVSS 8.7) — A vulnerability, which was classified as critical, has been found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. T…
    CVE-2024-7181 (CVSS 5.3) — A vulnerability classified as critical was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. This vulnerability…
    CVE-2024-7180 (CVSS 8.7) — A vulnerability classified as critical has been found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. This affects …

    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