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CVE-2025-41691— CODESYS Control DoS via Unauthenticated NULL Pointer Dereference

Quick assessment

Affected
CODESYS Control RTE (SL)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CODESYS Control是德国CODESYS公司的一套工业控制程序编程软件。 CODESYS Control存在代码问题漏洞，该漏洞源于空指针取消引用，可能导致拒绝服务。

CVSS 7.5 · High EPSS 0.55% · P44
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I. Basic Information for CVE-2025-41691

Vulnerability Information
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Vulnerability Title
CODESYS Control DoS via Unauthenticated NULL Pointer Dereference
Source: CVE Program / CVE List V5
Vulnerability Description
An unauthenticated remote attacker may trigger a NULL pointer dereference in the affected CODESYS Control runtime systems by sending specially crafted communication requests, potentially leading to a denial-of-service (DoS) condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
CODESYS Control 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CODESYS Control是德国CODESYS公司的一套工业控制程序编程软件。 CODESYS Control存在代码问题漏洞，该漏洞源于空指针取消引用，可能导致拒绝服务。
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 Control RTE (SL) 3.5.21.10 ~ 3.5.21.20 -
CODESYS Control RTE (for Beckhoff CX) SL 3.5.21.10 ~ 3.5.21.20 -
CODESYS Control Win (SL) 3.5.21.10 ~ 3.5.21.20 -
CODESYS HMI (SL) 3.5.21.10 ~ 3.5.21.20 -
CODESYS Control for BeagleBone SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for emPC-A/iMX6 SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for IOT2000 SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for Linux ARM SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for Linux SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for PFC100 SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for PFC200 SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for PLCnext SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for Raspberry Pi SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Control for WAGO Touch Panels 600 SL 4.16.0.0 ~ 4.17.0.0 -
CODESYS Virtual Control SL 4.16.0.0 ~ 4.17.0.0 -

II. Public POCs for CVE-2025-41691

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III. Intelligence Information for CVE-2025-41691

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Vendor Advisories for CVE-2025-41691 (1)

Same Patch Batch · CODESYS · 2025-08-04 · 3 CVEs total

CVE-2025-41659 8.3 HIGH CODESYS Control PKI Exposure Enables Remote Certificate Access
CVE-2025-41658 5.5 MEDIUM CODESYS Toolkit Exposes Sensitive Files via Default Permissions

IV. Related Vulnerabilities

Same product: Control RTE (SL)
Same vendor: CODESYS
Same weakness: CWE-476

V. Comments for CVE-2025-41691

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