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Vulnerability record · CVE-2021-30480 · published 9 April 2021

CVE-2021-30480: Zoom chat vulnerability

Zoom · Chat

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.

8.8 CVSS 3.1 High EPSS 5.8% · top 7.1%
8.8CVSS 3.1 base score, v2 9.0
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200 Third Party Advisory
https://explore.zoom.us/en/trust/security/security-bulletin/ Vendor Advisory
https://sector7.computest.nl/post/2021-08-zoom/ ExploitThird Party Advisory
https://twitter.com/thezdi/status/1379855435730149378 Third Party Advisory
https://twitter.com/thezdi/status/1379859851061395459 Third Party Advisory
https://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2own Press/Media CoverageThird Party Advisory
https://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/ Press/Media CoverageThird Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-971/ Third Party AdvisoryVDB Entry
https://zoom.us/feature/messaging ProductVendor Advisory
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200 Third Party Advisory
https://explore.zoom.us/en/trust/security/security-bulletin/ Vendor Advisory
https://sector7.computest.nl/post/2021-08-zoom/ ExploitThird Party Advisory
https://twitter.com/thezdi/status/1379855435730149378 Third Party Advisory
https://twitter.com/thezdi/status/1379859851061395459 Third Party Advisory
https://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2own Press/Media CoverageThird Party Advisory
https://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/ Press/Media CoverageThird Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-971/ Third Party AdvisoryVDB Entry
https://zoom.us/feature/messaging ProductVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2021-30480), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.