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CVE-2021-22787

7.5 · HIGH

A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server of the device.

Published Feb 11, 2022CWE-20EPSS 1.04%

Overview

CVE-2021-22787 is a high-severity vulnerability. It was published on February 11, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refdownload.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-257-02Refdownload.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-257-02

How CyberStrike helps

Frequently asked questions

What is CVE-2021-22787?

CVE-2021-22787 is a high-severity vulnerability. It was published on February 11, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2021-22787?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-22787?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-22787?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-22787 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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