CVE-2026-76992
The CODESYS Gateway Client allocates memory based on a size field in a gateway response without enforcing an appropriate upper limit. An unauthenticated remote attacker controlling a malicious gateway can exploit this behavior to trigger excessive memory consumption, resulting in a denial-of-service condition thus leading to a total loss of availablity.
Published:Sep 30, 2026
Last Modified:Sep 30, 2026
EPS:Sep 30, 2026
EPSS Score:
CVSS Score:7.5
Affected Products
Vendor
Product
Action
Vendor
Codesys
Product
Codesys Development System 3
Codesys
Codesys Development System 3
Vendor
Codesys
Product
Codesys Edge Gateway For Linux
Codesys
Codesys Edge Gateway For Linux
Vendor
Codesys
Product
Codesys Edge Gateway For Windows
Codesys
Codesys Edge Gateway For Windows
Vendor
Codesys
Product
Codesys Gateway
Codesys
Codesys Gateway
Vendor
Codesys
Product
Codesys Hmi Sl
Codesys
Codesys Hmi Sl
Vendor
Codesys
Product
Codesys Opc Da Server Sl
Codesys
Codesys Opc Da Server Sl
Vendor
Codesys
Product
Codesys Plchandler
Codesys
Codesys Plchandler
Vendor
Codesys
Product
Codesys Runtime Toolkit
Codesys
Codesys Runtime Toolkit
Vendor
Codesys
Product
Development System V3
Codesys
Development System V3
Vendor
Codesys
Product
Edge Gateway For Linux
Codesys
Edge Gateway For Linux
Vendor
Codesys
Product
Gateway
Codesys
Gateway
Vendor
Codesys
Product
Hmi (sl)
Codesys
Hmi (sl)
Vendor
Codesys
Product
Opc Da Server
Codesys
Opc Da Server
Vendor
Codesys
Product
Plchandler
Codesys
Plchandler
Vendor
Codesys
Product
Runtime Toolkit
Codesys
Runtime Toolkit
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
