High severity · published Dec 1, 2025
CVE-2025-41700
CODESYS Development System - Deserialization of Untrusted Data
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately manipulated CODESYS project file with a CODESYS development system. This arbitrary code is executed in the user context.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CD
CODESYS Development System · CODESYS
0.0.0 before 3.5.21.40 · source: vendor
CO
Codesys · Codesys
before 3.5.21.40 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-41700
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-41700
Third Party Advisory
https://certvde.com/de/advisories/VDE-2025-101
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