CVE-2021-21000

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

Published May 24, 2021 CVSS 3.1 · 5.3 Medium EPSS 1.0% KEV · Not listed
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.

Remediation

Vendor Solution

WAGO recommends all effected users with CODESYS 2.3 Runtime PLCs to update to the firmware versions listed at https://cert.vde.com/en-us/advisories/vde-2021-014 in the solution paragraph.


Vendor Workaround

Use general security best practices to protect systems from local and network attacks. Do not allow direct access to the device from untrusted networks. Update to the latest firmware according to the table in chapter solutions.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-8409 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
CERTVDE
Published
Updated
Sep 16, 2024, 6:43 PM
Reserved
Dec 17, 2020, 12:00 AM
Status
Analyzed
Published
May 24, 2021, 11:15 AM
Modified
Jun 17, 2026, 3:34 AM