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Fencer Vulns
high 7.5

CVE-2025-41691 json

CODESYS Control DoS via Unauthenticated NULL Pointer Dereference

published 2025-08-04 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-23490

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • CODESYS Control RTE (SL) 3.5.21.20
  • CODESYS Control RTE (for Beckhoff CX) SL 3.5.21.20
  • CODESYS Control Win (SL) 3.5.21.20
  • CODESYS HMI (SL) 3.5.21.20
  • CODESYS Control for BeagleBone SL 4.17.0.0
  • CODESYS Control for emPC-A/iMX6 SL 4.17.0.0
  • CODESYS Control for IOT2000 SL 4.17.0.0
  • CODESYS Control for Linux ARM SL 4.17.0.0
  • CODESYS Control for Linux SL 4.17.0.0
  • CODESYS Control for PFC100 SL 4.17.0.0
  • CODESYS Control for PFC200 SL 4.17.0.0
  • CODESYS Control for PLCnext SL 4.17.0.0
  • CODESYS Control for Raspberry Pi SL 4.17.0.0
  • CODESYS Control for WAGO Touch Panels 600 SL 4.17.0.0
  • CODESYS Virtual Control SL 4.17.0.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-132-03 updated cvss 7.5

ABB AC500 V3 Multiple Vulnerabilities

  • ABB AC500 V3 <3.9.0
    affected: vendor fix, workaround, mitigation
  • ABB AC500 V3 3.9.0
    fixed

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
15 mo ago

Exploit prediction

0.64% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • CODESYS Control RTE (SL)
  • CODESYS Control RTE (for Beckhoff CX) SL
  • CODESYS Control Win (SL)
  • CODESYS HMI (SL)
  • CODESYS Control for BeagleBone SL
  • CODESYS Control for emPC-A/iMX6 SL
  • CODESYS Control for IOT2000 SL
  • CODESYS Control for Linux ARM SL
  • CODESYS Control for Linux SL
  • CODESYS Control for PFC100 SL
  • CODESYS Control for PFC200 SL
  • CODESYS Control for PLCnext SL
  • CODESYS Control for Raspberry Pi SL
  • CODESYS Control for WAGO Touch Panels 600 SL
  • CODESYS Virtual Control SL

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.