CVE-2026-44469 Details
Description
The affected product extracts installation files to a temporary directory with incorrect default permissions during administrative installation. A low-privileged local attacker can exploit a TOCTOU race condition with a practical time window to replace verified files with malicious ones before installation, resulting in local privilege escalation.
A local privilege escalation vulnerability has been identified in the CODESYS Development System, specifically in versions prior to 3.5.22.20. During administrative installations, the application extracts files to a temporary directory with improper default permissions. This flaw allows low-privileged local attackers to exploit a Time-of-Check to Time-of-Use (TOCTOU) race condition, replacing verified installation files with malicious ones before they are installed. The vulnerability takes advantage of a practical time window, leading to unauthorized privilege escalation.
Users are advised to update the CODESYS Development System to version 3.5.22.20. The update is available through the CODESYS Installer, the CODESYS Store, or the CODESYS Update area.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.certvde.com/en/advisories/VDE-2026-055/ | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-276 | Incorrect Default Permissions | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| codesys development system | < 3.5.22.20 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 28, 2026 | Initial Analysis | [email protected] |
| May 26, 2026 | New CVE Received | [email protected] |