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    CVE-2021-35327

    A vulnerability in TOTOLINK A720R A720R_Firmware v4.1.5cu.470_B20200911 allows attackers to start the Telnet service, then login with the default credentials via a crafted POST request.

    Published:Aug 5, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 5, 2021
    EPSS Score:0.00443
    CVSS Score:9.8

    Affected Products

    Vendor
    Totolink
    Product
    A720r
    Vendor
    Totolink
    Product
    A720r Firmware

    Exploits

    https://github.com/hurricane618/my_cves/blob/master/router/totolink/A720R_default_telnet_info.mdhttps://github.com/hurricane618/my_cves/blob/master/router/totolink/A720R_default_telnet_info.md

    Common Weakness Enumeration

    CWE-862 Missing Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-665 Exploitation of Thunderbolt Protection Flaws

    Related CVEs

    CVE-2026-82539 (CVSS 8.5) — A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilter…
    CVE-2025-60682 (CVSS 6.5) — A command injection vulnerability exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within t…
    CVE-2025-60685 (CVSS 5.1) — A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf…
    CVE-2025-60683 (CVSS 6.5) — A command injection vulnerability exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within t…
    CVE-2025-60686 (CVSS 5.1) — A local stack-based buffer overflow vulnerability exists in the infostat.cgi and cstecgi.cgi binaries of ToToL…
    CVE-2025-9303 (CVSS 7.4) — A security flaw has been discovered in TOTOLINK A720R 4.1.5cu.630_B20250509. This issue affects the function s…
    CVE-2025-4271 (CVSS 6.9) — A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been declared as problematic. Affected by this…
    CVE-2025-4270 (CVSS 6.9) — A vulnerability was found in TOTOLINK A720R 4.1.5cu.374. It has been classified as problematic. Affected is an…
    CVE-2025-4269 (CVSS 6.9) — A vulnerability was found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This issue affects some un…
    CVE-2025-4268 (CVSS 6.9) — A vulnerability has been found in TOTOLINK A720R 4.1.5cu.374 and classified as critical. This vulnerability af…

    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