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CVE-2026-72842— OpenWrt luci-app-lxc ACL Inconsistency Authentication Bypass

Quick assessment

Affected
openwrt luci
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenWRT LuCI是OpenWRT社区开源的一个网页管理界面。 OpenWRT LuCI存在输入验证错误漏洞，该漏洞源于ACL不一致，允许低权限认证LuCI用户访问后端容器管理路由，通过lxc_name参数中的/.%2E进行路径遍历，逃逸容器目录并控制通过lxc.hook.start-host执行的主机侧脚本，可能导致以root权限执行代码。

CVSS 9.9 · Critical EPSS 0.42% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
openwrt luci any affected
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I. Basic Information for CVE-2026-72842

Vulnerability Information
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Vulnerability Title
OpenWrt luci-app-lxc ACL Inconsistency Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
luci-app-lxc contains an ACL inconsistency vulnerability that allows low-privileged authenticated LuCI users to access backend container management routes without proper authorization checks. Attackers can exploit path traversal via `/.%2E` in the `lxc_name` parameter to escape container directories and control host-side scripts executed through `lxc.hook.start-host`, achieving root code execution on the OpenWrt host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
文件名或路径的外部可控制
Source: CVE Program / CVE List V5
Vulnerability Title
OpenWRT LuCI 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenWRT LuCI是OpenWRT社区开源的一个网页管理界面。 OpenWRT LuCI存在输入验证错误漏洞，该漏洞源于ACL不一致，允许低权限认证LuCI用户访问后端容器管理路由，通过lxc_name参数中的/.%2E进行路径遍历，逃逸容器目录并控制通过lxc.hook.start-host执行的主机侧脚本，可能导致以root权限执行代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openwrt luci - -

II. Public POCs for CVE-2026-72842

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8469 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-72842

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Vendor Advisories for CVE-2026-72842 (1)

News Coverage for CVE-2026-72842 (1)

Same Patch Batch · openwrt · 2026-08-13 · 3 CVEs total

CVE-2026-72841 9.9 CRITICAL luci-app-openvpn Path Traversal RCE via instance_name2
CVE-2026-72840 8.8 HIGH OpenWrt LuCI luci-mod-system-mounts ACL Root RCE via Crontab Write

IV. Related Vulnerabilities

Same product: luci
Same vendor: openwrt
Same weakness: CWE-73

V. Comments for CVE-2026-72842

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