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    CVE-2025-60685

    A stack buffer overflow exists in the ToToLink A720R Router firmware V4.1.5cu.614_B20230630 within the sysconf binary (sub_401EE0 function). The binary reads the /proc/stat file using fgets() into a local buffer and subsequently parses the line using sscanf() into a single-byte variable with the %s format specifier. Maliciously crafted /proc/stat content can overwrite adjacent stack memory, potentially allowing an attacker with filesystem write privileges to execute arbitrary code on the device.

    Published:Nov 13, 2025
    Last Modified:Nov 17, 2025
    EPS:Nov 13, 2025
    EPSS Score:0.00013
    CVSS Score:5.1

    Affected Products

    Vendor
    Totolink
    Product
    A720r
    Vendor
    Totolink
    Product
    A720r Firmware

    Exploits

    https://github.com/yifan20020708/SGTaint-0-day/blob/main/ToToLink/ToToLink-A720R/CVE-2025-60685.md

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    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-2025-60683 (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…
    CVE-2024-8869 (CVSS 2.3) — A vulnerability classified as critical has been found in TOTOLINK A720R 4.1.5. Affected is the function export…

    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