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CVE-2021-30481

8.0 · HIGH

Valve Steam before 2021-04-17, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after…

Published Apr 10, 2021CWE-120EPSS 3.50%

Overview

CVE-2021-30481 is a high-severity vulnerability. It was published on April 10, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Valve Steam before 2021-04-17, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after one click.

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

Refnews.ycombinator.com/item?id=26762170Reftwitter.com/floesen_/status/1337107178096881666Reftwitter.com/the_secret_club/status/1380868759129296900Refwww.youtube.com/watch?v=rNQn--9xR1QRefnews.ycombinator.com/item?id=26762170Reftwitter.com/floesen_/status/1337107178096881666Reftwitter.com/the_secret_club/status/1380868759129296900Refwww.youtube.com/watch?v=rNQn--9xR1Q

How CyberStrike helps

Frequently asked questions

What is CVE-2021-30481?

CVE-2021-30481 is a high-severity vulnerability. It was published on April 10, 2021 and has a CVSS 3.1 base score of 8.0 (HIGH).

How severe is CVE-2021-30481?

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-30481?

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-2021-30481?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-30481 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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