CVE-2021-30480

Name: CVE-2021-30480
Creator: NVD / NIST
Published: 2021-04-09T23:15:12.957+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 5.84%

Last modified Jun 17, 2026

CVE-2021-30480 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 5.84% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

5.84%

92.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Zoom	Chat	<= 2021-04-09

References

https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/Third Party Advisory
https://explore.zoom.us/en/trust/security/security-bulletin/Vendor Advisory
https://sector7.computest.nl/post/2021-08-zoom/Exploit, Third Party Advisory
https://twitter.com/thezdi/status/1379855435730149378Third Party Advisory
https://twitter.com/thezdi/status/1379859851061395459Third Party Advisory
https://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2ownPress/Media Coverage, Third Party Advisory
https://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/Press/Media Coverage, Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-971/Third Party Advisory, VDB Entry
https://zoom.us/feature/messagingProduct, Vendor Advisory
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/Third Party Advisory
https://explore.zoom.us/en/trust/security/security-bulletin/Vendor Advisory
https://sector7.computest.nl/post/2021-08-zoom/Exploit, Third Party Advisory
https://twitter.com/thezdi/status/1379855435730149378Third Party Advisory
https://twitter.com/thezdi/status/1379859851061395459Third Party Advisory
https://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2ownPress/Media Coverage, Third Party Advisory
https://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/Press/Media Coverage, Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-971/Third Party Advisory, VDB Entry
https://zoom.us/feature/messagingProduct, Vendor Advisory

Timeline

Published: Apr 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30480?

How severe is CVE-2021-30480?

CVE-2021-30480 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 5.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30480?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30480?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST