CVE-2026-44469
highpriority · track · 28OT risk · elevatedEPSS 0.001 · 2 %ileDEEUUSEPSS · scored 2026-10-22
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedCODESYS Development Systemcodesys_psirt
Update the following product to version 3.5.22.20. * CODESYS Development System The CODESYS Development System and the products available as CODESYS add-ons can be downloaded and installed directly with the CODESYS Installer or be downloaded from the CODESYS Store. Alternatively, as well as for all other products, you will find further information on obtaining the software update in the CODESYS Update area https://www.codesys.com/download/.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–8.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (6)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- Advisory2026-09_VDE-2026-055CODESYS Development System - Incorrect Default Permissions2026-05-26csaf · codesys_psirtDE
Two local privilege escalation vulnerabilities were identified in the CODESYS Development System. Specifically, the PackageManager and the IPM create temporary directories with insecure default permissions when executed with administrative privileges. This allows low-privileged local users to modify a temporary bootstrap file to force the deployment of arbitrary components, or to exploit a Time-of-Check to Time-of-Use (TOCTOU) race condition to replace digitally verified installation files with malicious ones prior to installation. Both flaws bypass intended security boundaries during the installation of packages or add-ons.
- WID-SEC-W-2026-1675CODESYS: Mehrere SchwachstellenDeutsch2026-05-25csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in CODESYS ausnutzen, um seine Privilegien zu erhöhen, um Daten zu manipulieren, und um einen Denial of Service Angriff durchzuführen.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (4)
External citations — patches, advisories, analysis.
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