OS Command Injection in luci-app-advanced-reboot (CVE-2026-55897)
Summary
OS command injection in luci-app-advanced-reboot (CVE-2026-55897). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.1.2-6 or later.
Original description
The description as published by the source.
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: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-55897 has been found in luci-app-advanced-reboot.
Successful exploitation can lead to full system takeover. CVSS score: 8.8/10.
What to do: upgrade luci-app-advanced-reboot to 1.1.2-6 or later.
If unsure, ask your IT team or search "luci-app-advanced-reboot CVE-2026-55897" on the vendor's site.
CVE-2026-55897 (luci-app-advanced-reboot) — CWE-78 / CVSS v3 8.8
Attack vector: remote (network-reachable) / no user interaction
Patched: 1.1.2-6 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
OS command injection (CWE-78) exists in luci-app-advanced-reboot.
Check the vendor advisory for the affected versions of luci-app-advanced-reboot.
Severity: High (CVSS 8.8/10). Successful exploitation can lead to full system takeover.
Update to 1.1.2-6.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'luci-app-advanced-reboot' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'luci-app-advanced-reboot' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
luci-app-advanced-rebootを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade luci-app-advanced-reboot to 1.1.2-6ステージング環境で 1.1.2-6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。