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VulnerabilityPublished

CVE-2025-41660: CODESYS Control RTE (SL) · Incorrect Resource Transfer Between Spheres

Affects CODESYS Control RTE (SL)Source CVE Database V5

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Not known to be exploited · CVSS 8.8 High : upgrade to 3.5.22.0 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 3.5.22.0, 4.21.0.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade CODESYS to 3.5.22.0 (Control RTE (SL), Control RTE (for Beckhoff CX) SL, Control Win (SL), HMI (SL), Runtime Toolkit) or 4.21.0.0 (Control for BeagleBone SL, Control for emPC-A/iMX6 SL, Control for IOT2000 SL, Control for Linux ARM SL, Control for Linux SL, Control for PFC100 SL, Control for PFC200 SL, Control for PLCnext SL, Control for Raspberry Pi SL, Control for WAGO Touch Panels 600 SL, Virtual Control SL).

Affected software

ProductAffectedFixed in
CODESYSCODESYS Control RTE (SL)Affected
  • <3.5.22.0
Fixed in
  • 3.5.22.0
CODESYSCODESYS Control RTE (for Beckhoff CX) SLAffected
  • <3.5.22.0
Fixed in
  • 3.5.22.0
CODESYSCODESYS Control Win (SL)Affected
  • <3.5.22.0
Fixed in
  • 3.5.22.0
CODESYSCODESYS HMI (SL)Affected
  • <3.5.22.0
Fixed in
  • 3.5.22.0
CODESYSCODESYS Runtime ToolkitAffected
  • <3.5.22.0
Fixed in
  • 3.5.22.0
CODESYSCODESYS Control for BeagleBone SLAffected
  • <4.21.0.0
Fixed in
  • 4.21.0.0

AI-suggested

If you cannot patch yet, restrict network access to the affected system and monitor for suspicious activity related to boot application modifications.

Description

CVE-2025-41660 is a high-severity vulnerability in CODESYS Control RTE (SL) that allows a low-privileged remote attacker to replace the boot application of the runtime system. This unauthorized modification can lead to execution of arbitrary code with potentially full control over the affected system. The vulnerability is classified under CWE-669, indicating incorrect resource transfer between security spheres.

References

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