Zoom Chat through 2021-04-09 on Windows and macOS allows certain remote authenticated…
Priority MEDIUM 48Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.07211 94th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zoom:chat:*:*:*:*:*:*:*:* | up to 2021-04-09 | Vulnerable | Zoom Video Communications, Inc. |
| cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Apple |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:zoom:chat:*:*:*:*:*:*:*:* Versions up to 2021-04-09 Vulnerable ·Zoom Video Communications, Inc.
- cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-30480
- 2026-10-03 Alias added: GHSA-r6hm-86cv-xhmq
References
Advisory 8
- https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/
- https://twitter.com/thezdi/status/1379855435730149378
- https://twitter.com/thezdi/status/1379859851061395459
- https://zoom.us/feature/messaging
- https://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2own
- https://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/
- https://www.zerodayinitiative.com/advisories/ZDI-21-971/
- https://explore.zoom.us/en/trust/security/security-bulletin/
Sources
- CVE-2021-30480 · CVE Program
- CVE-2021-30480 · NVD
- FIRST EPSS
- GHSA-r6hm-86cv-xhmq · GitHub Advisory Database · CC BY 4.0
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