CVE-2026-2364— CODESYS Installer TOCTOU Privilege Escalation
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I. Basic Information for CVE-2026-2364
Vulnerability Information
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Vulnerability Title
CODESYS Installer TOCTOU Privilege Escalation
Source: NVD (National Vulnerability Database)
Vulnerability Description
If a legitimate user confirms a self-update prompt or initiate an installation of a CODESYS Development System, a low privileged local attacker can gain elevated rights due to a TOCTOU vulnerability in the CODESYS installer.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: NVD (National Vulnerability Database)
Vulnerability Title
CODESYS Development System 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CODESYS Development System是德国CODESYS公司的一套用于工业控制器和自动化技术领域的编程工具。 CODESYS Development System存在安全漏洞，该漏洞源于CODESYS安装程序中存在TOCTOU漏洞，可能导致低权限本地攻击者获得提升的权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| CODESYS | CODESYS Installer | 0.0.0 ~ 2.6.1.0 | - |
II. Public POCs for CVE-2026-2364
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: CODESYS
- CVE-2026-35225
Improper timeout handling in CODESYS EtherNetIP - CVE-2026-3509
CODESYS Control Audit Log Format String DoS - CVE-2025-41660
CODESYS Control Boot Application Replacement Enables Code Ex - CVE-2025-41700
CODESYS Development System - Deserialization of Untrusted Da - CVE-2025-41738
CODESYS Control - Invalid type usage in visualization
Same weakness: CWE-367
- CVE-2026-42344
FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress al - CVE-2026-44694
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API clien - CVE-2025-69233
Apache CloudStack: Domain/account resources limits not honor - CVE-2026-34354
Akamai Guardicore Platform Agent 安全漏洞 - CVE-2026-41002
VMware Spring Cloud Config 安全漏洞
V. Comments for CVE-2026-2364
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