---
cve: "CVE-2026-55897"
severity: "HIGH"
cvss: 8.8
epss: "27.6%"
vendor: "OpenWRT"
kev: false
exploited: false
published: "2026-09-21 20:17:26"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T06:57:46+02:00"
---

# CVE-2026-55897

> 8.8 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55897) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_