High severity · published Feb 11, 2022
CVE-2021-22800
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
7.5
CVSS
1%
EPSS
No
On KEV
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)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M218 Firmware · Schneider-electric
through 5.1.0.6 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22800
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22800
Patch
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-285-04
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