CVE-2026-8047
Out-of-bounds Write in CODESYS Control
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1284 |
| Vendor | codesys |
| Product | codesys control rte (sl) |
| Published | May 26, 2026 |
| Last Updated | May 26, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
CODESYS / CODESYS Control RTE (SL)
3.5.21.0 < 3.5.22.20
CODESYS / CODESYS Control RTE (for Beckhoff CX) SL
3.5.21.0 < 3.5.22.20
CODESYS / CODESYS Control Win (SL)
3.5.21.0 < 3.5.22.20
CODESYS / CODESYS HMI (SL)
3.5.21.0 < 3.5.22.20
CODESYS / CODESYS Runtime Toolkit
3.5.21.0 < 3.5.22.20
CODESYS / CODESYS Control for BeagleBone SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for emPC-A/iMX6 SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for IOT2000 SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Linux ARM SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Linux SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PFC100 SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PFC200 SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for PLCnext SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for Raspberry Pi SL
4.15.0.0 < 4.21.0.0
CODESYS / CODESYS Control for WAGO Touch Panels 600 SL
0.0.0 < 4.21.0.0
CODESYS / CODESYS Virtual Control SL
4.15.0.0 < 4.21.0.0