CVE-2026-59260: Improper Privilege Management in openwrt luci
CVE-2026-59260 is a high-severity vulnerability in the OpenWrt luci-app-samba4 component. It involves improper privilege management where read ACL permissions grant file.exec rights on /usr/sbin/smbd. This allows authenticated delegated users to execute the Samba daemon with command-line arguments they control. Attackers can leverage this to pass arbitrary Samba global options, including message commands, to a root smbd process, potentially leading to command execution triggered by SMB protocol message processing.
AI Analysis
Technical Summary
The vulnerability in OpenWrt luci-app-samba4 arises from overly permissive ACLs that grant file execution permission on the Samba daemon binary (/usr/sbin/smbd) to authenticated delegated users. This improper privilege management enables these users to execute the Samba daemon with caller-controlled command-line arguments. Exploitation involves passing arbitrary Samba global options such as the message command to a root-privileged smbd process, which can trigger command execution when processing SMB protocol messages. The CVSS 4.0 base score is 8.7, reflecting network attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability.
Potential Impact
An authenticated delegated user can execute the Samba daemon with arbitrary command-line arguments under root privileges. This can lead to remote command execution on the affected system via crafted SMB protocol messages, compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Until a patch is available, restrict access to authenticated delegated users and monitor for suspicious activity related to Samba daemon execution.
CVE-2026-59260: Improper Privilege Management in openwrt luci
Description
CVE-2026-59260 is a high-severity vulnerability in the OpenWrt luci-app-samba4 component. It involves improper privilege management where read ACL permissions grant file.exec rights on /usr/sbin/smbd. This allows authenticated delegated users to execute the Samba daemon with command-line arguments they control. Attackers can leverage this to pass arbitrary Samba global options, including message commands, to a root smbd process, potentially leading to command execution triggered by SMB protocol message processing.
CVSS v4.0
Score 8.7high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in OpenWrt luci-app-samba4 arises from overly permissive ACLs that grant file execution permission on the Samba daemon binary (/usr/sbin/smbd) to authenticated delegated users. This improper privilege management enables these users to execute the Samba daemon with caller-controlled command-line arguments. Exploitation involves passing arbitrary Samba global options such as the message command to a root-privileged smbd process, which can trigger command execution when processing SMB protocol messages. The CVSS 4.0 base score is 8.7, reflecting network attack vector, low attack complexity, no user interaction, and high impacts on confidentiality, integrity, and availability.
Potential Impact
An authenticated delegated user can execute the Samba daemon with arbitrary command-line arguments under root privileges. This can lead to remote command execution on the affected system via crafted SMB protocol messages, compromising system confidentiality, integrity, and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround has been documented at this time. Until a patch is available, restrict access to authenticated delegated users and monitor for suspicious activity related to Samba daemon execution.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-07-04T12:17:14.302Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a53860e68715ace4310e390
Added to database: 07/12/2026, 12:18:22 UTC
Last enriched: 07/12/2026, 12:32:41 UTC
Last updated: 07/12/2026, 13:13:22 UTC
Views: 5
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