Vulnerability details

CVE-2026-55897

openwrt luci

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

CVSS 3.1

8.8High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.8High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
openwrt	luci	< 1.1.2-6	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/openwrt/luci/pull/8710 x_refsource_MISC
https://github.com/openwrt/luci/commit/2df00deb122093cbf429266ffef7ad06aaecb48f x_refsource_MISC
https://github.com/openwrt/luci/commit/f85102548ee8325bfd581a0327b210b5f7670829 x_refsource_MISC
https://github.com/openwrt/luci/security/advisories/GHSA-vj96-f37g-37f6 x_refsource_CONFIRM

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Details

Published: 2026-09-21
Last updated: 2026-09-21
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.65%

Probability of exploitation in 30 days

51.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-78
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')