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CVE-2021-21000

WAGO: PFC200 Denial of Service due to the number of connections to the runtime

Published: May 24, 2021Updated: Aug 15, 2025 Sources: CVE List NVD BDUCWE-770
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
1.0%
Top 40.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

On WAGO PFC200 devices in different firmware versions with special crafted packets an attacker with network access to the device could cause a denial of service for the login service of the runtime.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
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:LAvailability
Low
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Weaknesses

CWE-770

Affected Products

Series PFC200 ControllerWAGOICS / OT / IoT
Series Ethernet ControllerWAGOICS / OT / IoT
750-823 firmwarewagoICS / OT / IoT
750-829 firmwarewagoICS / OT / IoT
750-831 firmwarewagoICS / OT / IoT
wagocommercialDEICS / OT / IoT
and 51 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://cert.vde.com/en-us/advisories/vde-2021-014
cert.vde.com
https://nvd.nist.gov/vuln/detail/CVE-2021-21000
nvd.nist.gov

Timeline

Published
May 24, 2021
Last Updated
Aug 15, 2025

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