Quick answers
- Is CVE-2026-55897 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-55897 being exploited in the wild.
- How severe is CVE-2026-55897?
- High severity, with a CVSS score of 8.8, published 21 September 2026.
- Which products and versions are affected?
- OpenWrt Luci-App-Advanced-Reboot prior to 1.1.2-6.
- Is there a fix for CVE-2026-55897?
- A patch was published on 2026-06-15: Version 1.1.2-6 released with security fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-55897 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-55897?
- Check whether you run OpenWrt Luci-App-Advanced-Reboot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in the rpcd ACL configuration file that grants file.exec permission on /bin/sh to read-level access. An authenticated delegated session with read-only access can supply caller-controlled parameters; rpcd authorizes the path and passes those arguments to the shell, enabling arbitrary command execution as root. The fix in 1.1.2-6 removes the broad file-exec grants, moves privileged actions into a dedicated write block, and handles device info gathering server-side.
Affected products
- OpenWrt luci-app-advanced-reboot prior to 1.1.2-6
Timeline
- 2026-06-15: patched: Version 1.1.2-6 released with security fix
- 2026-09-21: disclosed