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CVE-2026-8047

Out-of-bounds Write in CODESYS Control

Published: May 26, 2026Updated: May 26, 2026 Sources: CVE List
NVD MITRE
7.5CVSS
HIGH

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.

EPSS Score
0.1%
Top 77.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-1284CWE-1284 Improper Validation of Specified Quantity in Input

Affected Products

CODESYS Control RTE (SL)
CODESYS
CODESYS Control RTE (for Beckhoff CX) SL
CODESYS
CODESYS Control Win (SL)
CODESYS
CODESYS HMI (SL)
CODESYS
CODESYS Runtime Toolkit
CODESYS
and 11 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://www.certvde.com/en/advisories/VDE-2026-057/
certvde.com

Timeline

Published
May 26, 2026
Last Updated
May 26, 2026

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