Is CVE-2026-59260 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-59260 being exploited in the wild.

How severe is CVE-2026-59260?

High severity, with a CVSS score of 8.8, published 12 July 2026.

Which products and versions are affected?

OpenWrt Luci-App-Samba4 Tested with 26.158.66357~46cd823; all versions prior to patch; OpenWrt Samba4-Server Tested with 4.22.7-r3.

Is there a fix for CVE-2026-59260?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-59260 attacked?

It is attacked over the network, in an operating system.

Am I affected by CVE-2026-59260?

Check whether you run OpenWrt Luci-App-Samba4 or OpenWrt Samba4-Server 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.

CVE-2026-59260: OpenWrt luci-app-samba4 privilege escalation in smbd ACL

CVE-2026-59260 · Severity: high · CVSS 8.8 · Published 2026-07-12

A security flaw in the OpenWrt Samba management interface allows users who are supposed to have limited, read-only access to take full control of the device. By exploiting a misconfiguration in how permissions are assigned, an authorized user can run the Samba service with custom settings that trigger the execution of malicious commands. This could lead to a complete system takeover, allowing an attacker to access sensitive data or disrupt network operations.

Vendors: OpenWrt.

Quick answers

Is CVE-2026-59260 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-59260 being exploited in the wild.
How severe is CVE-2026-59260?: High severity, with a CVSS score of 8.8, published 12 July 2026.
Which products and versions are affected?: OpenWrt Luci-App-Samba4 Tested with 26.158.66357~46cd823; all versions prior to patch; OpenWrt Samba4-Server Tested with 4.22.7-r3.
Is there a fix for CVE-2026-59260?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-59260 attacked?: It is attacked over the network, in an operating system.
Am I affected by CVE-2026-59260?: Check whether you run OpenWrt Luci-App-Samba4 or OpenWrt Samba4-Server 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

A privilege escalation vulnerability exists in the OpenWrt luci-app-samba4 package due to improper privilege management in its Access Control List (ACL) configuration. The 'read' ACL incorrectly grants 'file.exec' permissions for the /usr/sbin/smbd binary to delegated users. An authenticated attacker with these permissions can use the rpcd 'file.exec' function to launch a temporary smbd instance with arbitrary command-line arguments. By passing specific Samba global options (such as 'message command') via the '--option' flag and then triggering the SMB1 message path, the attacker can execute arbitrary commands with root privileges. The vulnerability requires an authenticated LuCI/rpcd session with at least read-only Samba permissions.

Affected products

OpenWrt luci-app-samba4 Tested with 26.158.66357~46cd823; all versions prior to patch
OpenWrt samba4-server Tested with 4.22.7-r3

Timeline

2026-06-27: advisory: Initial GitHub Security Advisory published
2026-07-12: disclosed: CVE published to NVD dataset

References

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