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  4. CVE 2026 55897 luci app advanced reboot read acl exposes binsh
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Back to active CVEs
High · CVSS 8.8CVE-2026-55897

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

Answer in brief

CVE-2026-55897 records a High severity (CVSS 8.8) vulnerability in luci-app-advanced-reboot read ACL exposes /bin/sh through file.exec, allowing delegated users to run commands as root. The current sources do not mark it as known exploited. The current feed maps openwrt/luci (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 21, 2026Updated Sep 24, 2026Source checked Nov 5, 2026First seen by HOL Sep 21, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openwrt/luci (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
openwrt/lucigeneric<1.1.2-61.1.2-6

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for openwrt/luci.
  2. 2Review the reported fix. Update openwrt/luci to 1.1.2-6 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • AG2: Newline injection in SandboxShellTool bypasses allowed=[...] and readonly=True, enabling arbitrary command executionAlso CWE-78

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-78
Source
CVE List V5
Source checked
Nov 5, 2026
References
4 linked sources
Open source record