Siemens License Server (SLS)

August 13, 2026·Source: CISA

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TL;DR

View CSAF Summary Siemens License Server is affected by multiple vulnerabilities which could allow an attacker to elevate its privileges and read arbitrary files on the system. Siemens has released a new version for Siemens License Server (SLS) and recommends to update to the latest version. The following versions of Siemens License Server (SLS) are affected: Siemens License Server (SLS) vers:intdot/<5.1, vers:intdot/<5.3 (CVE-2026-69108, CVE-2026-69109) CVSS Vendor Equipment Vulnerabilities

v3 7.5 Siemens Siemens License Server (SLS) Incorrect Permission Assignment for Critical Resource, Path Traversal: '.../...//'

Background Critical Infrastructure Sectors: Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2026-69108 The affected application is vulnerable to a local privilege escalation due to an insecure sudoers policy. This could allow an attacker to execute arbitrary commands and plant malicious files as root, leading to full system compromise. View CVE Details Affected Products Siemens License Server (SLS) Vendor: Siemens Product Version: Siemens License Server (SLS) < V5.1 Product Status: known_affected Remediations Vendor fix Update to V5.1 or later version https://support.sw.siemens.com/product/1586485382/ Relevant CWE: CWE-732 Incorrect Permission Assignment for Critical Resource Metrics CVSS Version Base Score Base Severity Vector String

3.1 6 MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CVE-2026-69109 The affected application is vulnerable to a path traversal vulnerability due to lack of sanitization of user input. This could allow a remote attacker to access arbitrary files on the application. View CVE Details Affected Products Siemens License Server (SLS) Vendor: Siemens Product Version: Siemens License Server (SLS) < V5.3 Product Status: known_affected Remediations Vendor fix Update to V5.3 or later version https://support.sw.siemens.com/product/

What Happened

Siemens License Server (SLS), reported by CISA.

v3 7.5 Siemens Siemens License Server (SLS) Incorrect Permission Assignment for Critical Resource, Path Traversal: '.../...//'

3.1 6 MEDIUM CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

For the full technical details, see the original report.

Why It Matters for Businesses

This development could affect organizations that rely on the impacted technologies or services. Unpatched systems, misconfigured infrastructure, or lack of monitoring can leave businesses exposed to exploitation, data breaches, and regulatory penalties.

How to Check Your Exposure

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Mitigation Steps

Patch immediately, Apply vendor patches or updates as soon as they are available.
Review configurations, Check firewall rules, access controls, and security headers.
Monitor logs, Watch for indicators of compromise (IOCs) related to this threat.
Update security policies, Ensure incident response plans cover this type of threat.
Run a security scan, Use automated tools to verify your exposure.

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