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CVE-2021-30480

8.5 · HIGH

Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arbitrary code without user interaction.

Published Apr 9, 2021EPSS 5.84%

Overview

CVE-2021-30480 is a high-severity vulnerability. It was published on April 9, 2021 and has a CVSS 3.1 base score of 8.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated attackers to execute arbitrary code without user interaction. An attacker must be within the same organization, or an external party who has been accepted as a contact. NOTE: this is specific to the Zoom Chat software, which is different from the chat feature of the Zoom Meetings and Zoom Video Webinars software.

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

Refblog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/Refexplore.zoom.us/en/trust/security/security-bulletin/Refsector7.computest.nl/post/2021-08-zoom/Reftwitter.com/thezdi/status/1379855435730149378Reftwitter.com/thezdi/status/1379859851061395459Refwww.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2ownRefwww.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/Refwww.zerodayinitiative.com/advisories/ZDI-21-971/Refzoom.us/feature/messagingRefblog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-30480?

CVE-2021-30480 is a high-severity vulnerability. It was published on April 9, 2021 and has a CVSS 3.1 base score of 8.5 (HIGH).

How severe is CVE-2021-30480?

This vulnerability has a CVSS 3.1 base score of 8.5, 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-2021-30480?

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-2021-30480?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-30480 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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