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CVE-2021-29241

Published: May 3, 2021Updated: May 29, 2026 Sources: CVE List NVD BDU csafCWE-476
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.4%
Top 30.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

CODESYS Gateway 3 before 3.5.16.70 has a NULL pointer dereference that may result in a denial of service (DoS).

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
Open in CVSS calculator →

Weaknesses

CWE-476

Affected Products

n/an/a
control for beaglebone slcodesysICS / OT / IoT
control for empc-a\/imx6 slcodesysICS / OT / IoT
control for iot2000 slcodesysICS / OT / IoT
control for linux slcodesysICS / OT / IoT
codesysoss-projectDEICS / OT / IoTaka codesys gmbh
and 17 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://customers.codesys.com/index.php
customers.codesys.com
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=14637&token=8dbd75ae7553ae3be25e22f741db783b31e14799&download=
customers.codesys.com
https://www.codesys.com/security/security-reports.html
codesys.com
and 231 more references View all →

Timeline

Published
May 3, 2021
Last Updated
May 29, 2026

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