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    CVE-2021-40404

    An authentication bypass vulnerability exists in the cgiserver.cgi Login functionality of reolink RLC-410W v3.0.0.136_20121102. A specially-crafted HTTP request can lead to authentication bypass. An attacker can send an HTTP request to trigger this vulnerability.

    Published:Jan 28, 2022
    Last Modified:Apr 15, 2025
    EPS:Jan 28, 2022
    EPSS Score:0.00252
    CVSS Score:6.5

    Affected Products

    Vendor
    Reolink
    Product
    Rlc-410w
    Vendor
    Reolink
    Product
    Rlc-410w Firmware

    Exploits

    https://talosintelligence.com/vulnerability_reports/TALOS-2021-1420https://talosintelligence.com/vulnerability_reports/TALOS-2021-1420

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-114 Authentication Abuse
    CAPEC-115 Authentication Bypass
    CAPEC-151 Identity Spoofing
    CAPEC-19 Embedding Scripts within Scripts
    CAPEC-194 Fake the Source of Data
    CAPEC-22 Exploiting Trust in Client
    CAPEC-441 Malicious Logic Insertion
    CAPEC-478 Modification of Windows Service Configuration
    CAPEC-479 Malicious Root Certificate
    CAPEC-502 Intent Spoof
    CAPEC-503 WebView Exposure
    CAPEC-536 Data Injected During Configuration
    CAPEC-546 Incomplete Data Deletion in a Multi-Tenant Environment
    CAPEC-550 Install New Service
    CAPEC-551 Modify Existing Service
    CAPEC-552 Install Rootkit
    CAPEC-556 Replace File Extension Handlers
    CAPEC-558 Replace Trusted Executable
    CAPEC-562 Modify Shared File
    CAPEC-563 Add Malicious File to Shared Webroot
    CAPEC-564 Run Software at Logon
    CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
    CAPEC-578 Disable Security Software
    CAPEC-593 Session Hijacking
    CAPEC-633 Token Impersonation
    CAPEC-650 Upload a Web Shell to a Web Server
    CAPEC-94 Adversary in the Middle (AiTM)

    Related CVEs

    CVE-2021-44394 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44375 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44366 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44357 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44356 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44355 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-44354 (CVSS 7.5) — Multiple denial of service vulnerabilities exist in the cgiserver.cgi JSON command parser functionality of Reo…
    CVE-2021-40405 (CVSS 6.5) — A denial of service vulnerability exists in the cgiserver.cgi Upgrade API functionality of Reolink RLC-410W v3…
    CVE-2021-44419 (CVSS 7.7) — A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC…
    CVE-2021-44417 (CVSS 7.7) — A denial of service vulnerability exists in the cgiserver.cgi JSON command parser functionality of reolink RLC…

    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