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CVE-2026-55897— luci-app-advanced-reboot read ACL exposes /bin/sh through file.exec, allowing delegated users to run commands as root

Quick assessment

Affected
openwrt luci
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

luci-app-advanced-reboot is a LuCI (web interface) application for OpenWrt that provides a way to reboot your router into an alternative firmware partition or perform reboot operations directly from the web UI. Prior to 1.1.2-6, the luci-app-advanced-reboot re

CVSS 8.8 · High EPSS 0.46% · P39

Affected Version Matrix 1

VendorProduct Version RangeStatus
openwrt luci < 1.1.2-6 affected
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I. Basic Information for CVE-2026-55897

Vulnerability Information

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Vulnerability Title
luci-app-advanced-reboot read ACL exposes /bin/sh through file.exec, allowing delegated users to run commands as root
Source: CVE Program / CVE List V5
Vulnerability Description
luci-app-advanced-reboot is a LuCI (web interface) application for OpenWrt that provides a way to reboot your router into an alternative firmware partition or perform reboot operations directly from the web UI. Prior to 1.1.2-6, the luci-app-advanced-reboot read ACL in applications/luci-app-advanced-reboot/root/usr/share/rpcd/acl.d/luci-app-advanced-reboot.json grants rpcd file.exec permission for the general shell interpreter /bin/sh. An authenticated delegated session with that read ACL can supply caller-controlled params; rpcd authorizes the executable path and passes those arguments to the shell, allowing arbitrary commands to execute as root. Builds without the /bin/sh exec grant, including the checked openwrt-24.10 and openwrt-23.05 branches, are not affected by this specific chain. This vulnerability is fixed in 1.1.2-6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
openwrt luci < 1.1.2-6 -

II. Public POCs for CVE-2026-55897

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III. Intelligence Information for CVE-2026-55897

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Patches & Fixes for CVE-2026-55897 (1)

Other References for CVE-2026-55897 (1)

IV. Related Vulnerabilities

Same product: luci
Same vendor: openwrt
Same weakness: CWE-78

V. Comments for CVE-2026-55897

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