High severity · published May 26, 2026
CVE-2026-44469
Incorrect Default Permissions in CODESYS Development System
7.0
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CD
CODESYS Development System · CODESYS
3.0.0.0 before 3.5.22.20 · source: vendor
DS
Development System · Codesys
before 3.5.22.20 · source: NVD
Affected product
CD
CODESYS Development System
CODESYS
More from CODESYS Development System
7.8
CVE-2026-44468
Incorrect Default Permissions in CODESYS Development System