Description
The affected products perform improper length checking when parsing incoming HTTP requests, resulting in a size-limited out-of-bounds write. An unauthenticated remote attacker can exploit this flaw to cause a denial of service via a system crash on the affected device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| CODESYS | CODESYS Control RTE (SL) | 3.5.21.0 – < 3.5.22.20 | 3.5.22.20 |
| CODESYS | CODESYS Control RTE (for Beckhoff CX) SL | 3.5.21.0 – < 3.5.22.20 | 3.5.22.20 |
| CODESYS | CODESYS Control Win (SL) | 3.5.21.0 – < 3.5.22.20 | 3.5.22.20 |
| CODESYS | CODESYS HMI (SL) | 3.5.21.0 – < 3.5.22.20 | 3.5.22.20 |
| CODESYS | CODESYS Runtime Toolkit | 3.5.21.0 – < 3.5.22.20 | 3.5.22.20 |
| CODESYS | CODESYS Control for BeagleBone SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for emPC-A/iMX6 SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for IOT2000 SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for Linux ARM SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for Linux SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for PFC100 SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for PFC200 SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for PLCnext SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for Raspberry Pi SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Control for WAGO Touch Panels 600 SL | 0.0.0 – < 4.21.0.0 | 4.21.0.0 |
| CODESYS | CODESYS Virtual Control SL | 4.15.0.0 – < 4.21.0.0 | 4.21.0.0 |
Advisories 2
- ADVISORY2026-10_VDE-2026-057 CODESYS Control - Out-of-bounds Write CERT@VDE · Jun 18, 2026
- WID-SEC-2026-1675 CODESYS: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 26, 2026