Out-of-bounds Write in CODESYS Control

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-8047
StatePUBLISHED
AssignerCERTVDE
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-26 08:16:22 UTC
Updated2026-05-26 20:00:24 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.000750000 probability, percentile 0.226910000 (date 2026-05-31)

Problem Types: CWE-1284 | CWE-1284 CWE-1284 Improper Validation of Specified Quantity in Input

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA CODESYS CODESYS Control RTE SL affected 3.5.21.0 3.5.22.20 semver Not specified
CNA CODESYS CODESYS Control RTE For Beckhoff CX SL affected 3.5.21.0 3.5.22.20 semver Not specified
CNA CODESYS CODESYS Control Win SL affected 3.5.21.0 3.5.22.20 semver Not specified
CNA CODESYS CODESYS HMI SL affected 3.5.21.0 3.5.22.20 semver Not specified
CNA CODESYS CODESYS Runtime Toolkit affected 3.5.21.0 3.5.22.20 semver Not specified
CNA CODESYS CODESYS Control For BeagleBone SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For EmPC-A/iMX6 SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For IOT2000 SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For Linux ARM SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For Linux SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For PFC100 SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For PFC200 SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For PLCnext SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For Raspberry Pi SL affected 4.15.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Control For WAGO Touch Panels 600 SL affected 0.0.0 4.21.0.0 semver Not specified
CNA CODESYS CODESYS Virtual Control SL affected 4.15.0.0 4.21.0.0 semver Not specified

References

ReferenceSourceLinkTags
www.certvde.com/en/advisories/VDE-2026-057 [email protected] www.certvde.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report