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CVE-2021-40833

5.5 · MEDIUM

A vulnerability affecting F-Secure antivirus engine was discovered whereby unpacking UPX file can lead to denial-of-service.

Published Nov 26, 2021CWE-404EPSS 0.41%

Overview

CVE-2021-40833 is a medium-severity vulnerability. It was published on November 26, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A vulnerability affecting F-Secure antivirus engine was discovered whereby unpacking UPX file can lead to denial-of-service. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.

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

Refwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40833Refwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40833

How CyberStrike helps

Frequently asked questions

What is CVE-2021-40833?

CVE-2021-40833 is a medium-severity vulnerability. It was published on November 26, 2021 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-40833?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-40833?

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-2021-40833?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-40833 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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