Deserialization in Codesys Development System
CVE-2021-21865
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.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.014 (72.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.014 · change: +0.001
Affected products
- Codesys Development System — versions 3.5.16.0, 3.5.17.0
- Codesys — versions CODESYS GmbH CODESYS Development System 3.5.16
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1301 (Third Party Advisory, Not Applicable)
- customers.codesys.com/index.php (Patch, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-21865?
- CVE-2021-21865 is a high-severity vulnerability in Codesys Development System, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2021-08-02.
- How severe is CVE-2021-21865?
- High severity. CVSS v3 base score is 7.8 out of 10.