CVE-2021-30481
8.0 · HIGHOverview
CVE-2021-30481 is a high-severity vulnerability affecting valvesoftware steam_client. 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 and patches from valvesoftware. Update steam_client to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| valvesoftware | steam_client | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2021-30481?
CVE-2021-30481 is a high-severity vulnerability affecting valvesoftware steam_client. 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 and patches from valvesoftware. Update steam_client to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2021-30481 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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