CVE-2021-36764
published 2021-08-04CVE-2021-36764: In CODESYS Gateway V3 before 3.5.17.10, there is a NULL Pointer Dereference. Crafted communication requests may cause a Null pointer dereference in the…
PriorityP433high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.99%
58.4th percentile
In CODESYS Gateway V3 before 3.5.17.10, there is a NULL Pointer Dereference. Crafted communication requests may cause a Null pointer dereference in the affected CODESYS products and may result in a denial-of-service condition.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| codesys | gateway | >= 3.0 < 3.5.17.10 | 3.5.17.10 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
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CISA ICS
CODESYS in Festo Automation Suite
cisa_ics·2026-03-17
CODESYS in Festo Automation Suite
ICS Advisory
##
CODESYS in Festo Automation Suite
Release DateMarch 17, 2026
Alert CodeICSA-26-076-01
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## Summary
3. TECHNICAL DETAILS
The following versions of CODESYS in Festo Automation Suite are affected:
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation Suite (versions prior to 2.8.0.138) installed with CODESYS Software CODESYS Development System (3.5.16.10) vers:all/*
- FESTO Software Festo Automation Suite (2.8.0.137) installed with CODESYS Software CODESYS Development System (3.0) vers:all/*
- FESTO Software Festo Automation
CISA ICS
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
cisa_ics·2025-11-13
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
ICS Advisory
##
Festo Controller CECC-S,-LK,-D Family Firmware (Update A)
Last RevisedNovember 13, 2025
Alert CodeICSA-25-273-04
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Festo
- Equipment: Controller CECC-S,-LK,-D Family Firmware
- Vulnerabilities: Exposure of Resource to Wrong Sphere, Untrusted Pointer Dereference, NULL Pointer Dereference, Files or Directories Accessible to External Parties, Out-of-bounds Write, Improper Privilege Management, Incorrect Permission Assignment for Critical Resource, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Missing Release of Memory afte
GHSA
GHSA-qpw7-wx2f-6gc3: In CODESYS Gateway V3 before 3
ghsa_unreviewed·2022-05-24
CVE-2021-36764 [HIGH] CWE-476 GHSA-qpw7-wx2f-6gc3: In CODESYS Gateway V3 before 3
In CODESYS Gateway V3 before 3.5.17.10, there is a NULL Pointer Dereference. Crafted communication requests may cause a Null pointer dereference in the affected CODESYS products and may result in a denial-of-service condition.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-08-04
Published