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CVE-2021-21865

nvd nist
Published: Aug 2, 2021Modified: Jun 17, 2026

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7.8
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploitability: 1.8 / Impact: 5.9
Source: NVD

Description

A unsafe deserialization vulnerability exists in the PackageManagement.plugin ExtensionMethods.Clone() functionality of CODESYS GmbH CODESYS Development System 3.5.16. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.

Affected (2)

Codesys
1 product
Development System
Configuration A
2 vulnerable
Vulnerable SoftwareAffected Versions
Codesys
Development System
Version 3.5.16.0
Development System
Version 3.5.17.0

Related CWEs

CWE-502
Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

References (4)

Source: talos-cna@cisco.com
MitigationPatchVendor Advisory
Source: talos-cna@cisco.com
Not ApplicableThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
MitigationPatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Not ApplicableThird Party Advisory

Timeline

No history available yet.