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    CVE-2026-72840

    OpenWrt LuCI contains an overly permissive ACL definition in luci-mod-system-mounts that grants write access to /etc/crontabs/root to users intended only for mount configuration. Authenticated users with only the mount-configuration ACL group can append arbitrary cron entries via ubus file.write, which the default busybox crond daemon executes as root within one minute.

    Published:Aug 13, 2026
    Last Modified:Aug 14, 2026
    EPS:Aug 13, 2026
    EPSS Score:0.00303
    CVSS Score:8.8

    Affected Products

    Vendor
    Openwrt
    Product
    Luci

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-266 Incorrect Privilege Assignment

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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