CVE-2026-76992
Uncontrolled Memory Allocation in CODESYS Gateway Client
- State
- Published
- Severity
- 8.7 High
- Published
- Sep 30, 2026
- Updated
- Sep 30, 2026
- Reserved
- Aug 20, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CERTVDE |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CERTVDE |
Weaknesses
- CWE-770 Allocation of Resources Without Limits or Throttling
Affected Products
| Product | Versions |
|---|---|
Development System 3CODESYS |
|
GatewayCODESYS |
|
Edge Gateway for WindowsCODESYS |
|
HMI (SL)CODESYS |
|
OPC DA Server SLCODESYS |
|
PLCHandlerCODESYS |
|
Runtime ToolkitCODESYS |
|
Edge Gateway for LinuxCODESYS |
|
References
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