CVE-2026-72840
OpenWrt LuCI luci-mod-system-mounts ACL Root RCE via Crontab Write
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-266 |
| Vendor | openwrt |
| Product | luci |
| Published | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
openwrt / luci
All versions affected References
Credits
🔍 lujiefsi