CVE-2021-21866
published 2021-08-02CVE-2021-21866: A unsafe deserialization vulnerability exists in the ObjectManager.plugin ProfileInformation.ProfileData functionality of CODESYS GmbH CODESYS Development…
PriorityP339high7.8CVSS 3.1
AVLACLPRNUIRSUCHIHAH
EPSS
1.67%
74.1th percentile
A unsafe deserialization vulnerability exists in the ObjectManager.plugin ProfileInformation.ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| codesys | development_system | — | — |
| codesys | development_system | — | — |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
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CISA ICS
CODESYS in Festo Automation Suite
cisa_ics·2026-03-17
CODESYS in Festo Automation Suite
ICS Advisory
##
CODESYS in Festo Automation Suite
Release DateMarch 17, 2026
Alert CodeICSA-26-076-01
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## Summary
3. TECHNICAL DETAILS
The following versions of CODESYS in Festo Automation Suite are affected:
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.5.16.10) vers:all/*
- FESTO Software Festo Automation Suite (2.8.0.137) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation
GHSA
GHSA-rf3q-ppf3-vv43: A unsafe deserialization vulnerability exists in the ObjectManager
ghsa_unreviewed·2022-05-24
CVE-2021-21866 [HIGH] CWE-502 GHSA-rf3q-ppf3-vv43: A unsafe deserialization vulnerability exists in the ObjectManager
A unsafe deserialization vulnerability exists in the ObjectManager.plugin ProfileInformation.ProfileData functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.
No detection rules found.
No public exploits indexed.
Talos
Vulnerability Spotlight: Unsafe deserialization vulnerabilities in CODESYS Development System
blogs_talos·2021-07-26·CVSS 7.8
[HIGH] Vulnerability Spotlight: Unsafe deserialization vulnerabilities in CODESYS Development System
## Vulnerability Spotlight: Unsafe deserialization vulnerabilities in CODESYS Development System
Patrick DeSantis discovered these vulnerabilities. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in the CODESYS Development System.
The CODESYS Development System is the IEC 61131-3 programming tool for industrial control and automation technology, available in 32- and 64-bit versions.
This software contains multiple unsafe deserialization vulnerabilities that could allow an attacker to execute arbitrary code on the victim machine. These issues exist across a variety of the software’s functions. For more information on these vulnerabilities, read their individual advisories below.
TALOS-2021-1300 (CVE-2021-21863)
TALOS-2021-1301 (CVE-2021-21864)
TALOS-2021
Talos
Vulnerability Spotlight: Unsafe deserialization vulnerabilities in CODESYS Development System
blogs_talos·2021-07-26·CVSS 7.8
[HIGH] Vulnerability Spotlight: Unsafe deserialization vulnerabilities in CODESYS Development System
Patrick DeSantis discovered these vulnerabilities. Blog by Jon Munshaw.
Cisco Talos recently discovered multiple vulnerabilities in the CODESYS Development System.
The CODESYS Development System is the IEC 61131-3 programming tool for industrial control and automation technology, available in 32- and 64-bit versions.
This software contains multiple unsafe deserialization vulnerabilities that could allow an attacker to execute arbitrary code on the victim machine. These issues exist across a variety of the software’s functions. For more information on these vulnerabilities, read their individual advisories below.
- TALOS-2021-1300 (CVE-2021-21863)
- TALOS-2021-1301 (CVE-2021-21864)
- TALOS-2021-1302 (CVE-2021-21865)
- TALOS-2021-1303 (CVE-2021-21866)
- TALOS-2021-1304 (CVE-2021-21867)
-
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download=https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301https://talosintelligence.com/vulnerability_reports/TALOS-2021-1303https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download=https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301
2021-08-02
Published