CVE-2026-59260 openwrt CVE debrief

Who should care

Users of OpenWrt luci-app-samba4, OpenWrt administrators, security teams, and vulnerability management teams should verify their systems for exposure and apply patches or mitigations as available. Additionally, operators of affected systems, platform administrators, and security personnel responsible for vulnerability management and incident response should be aware of the potential impact and take necessary actions.

Technical summary

The OpenWrt luci-app-samba4 read ACL grants file.exec permission on /usr/sbin/smbd, allowing authenticated delegated users to execute the Samba daemon with caller-controlled command-line arguments. Attackers can pass arbitrary Samba global options such as message command to a root smbd process, triggering command execution when SMB protocol messages are processed. This vulnerability has a high CVSS score of 8.7, indicating high severity. Affected systems should be identified and patched or mitigated as soon as possible.

Defensive priority

High priority due to high CVSS score of 8.7 and potential for command execution.

Recommended defensive actions

• Verify and apply OpenWrt luci-app-samba4 patches or updates
• Restrict access to /usr/sbin/smbd and Samba configuration
• Monitor Samba logs for suspicious activity
• Limit delegated user permissions
• Implement compensating controls for Samba services
• Review OpenWrt luci-app-samba4 configurations for exposure
• Track exceptions and retest remediated assets

Evidence notes

Evidence from official CVE and NVD sources indicate a high severity vulnerability in OpenWrt luci-app-samba4. Limited details are available on affected versions or specific exploitation. Defenders should verify OpenWrt luci-app-samba4 configurations, review Samba global options, and monitor for suspicious activity. The CVE record was published on 2026-07-12T12:16:45.977Z and has not been modified since then. Additional review of vendor advisories and source references is recommended.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.