CVE-2021-22800

Description

A CWE-20: Improper Input Validation vulnerability exists that could cause a Denial of Service when a crafted packet is sent to the controller over network port 1105/TCP. Affected Product: Modicon M218 Logic Controller (V5.1.0.6 and prior)

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.33%
Vendor Advisory schneider-electric.com
Affected: n/a Modicon M218 Logic Controller (V5.1.0.6 and prior)
Published at:
Updated at:

References

Link Tags
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-285-04 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22800?
CVE-2021-22800 has been scored as a high severity vulnerability.
How to fix CVE-2021-22800?
To fix CVE-2021-22800, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22800 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22800 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22800?
CVE-2021-22800 affects n/a Modicon M218 Logic Controller (V5.1.0.6 and prior).
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.