CVE-2021-30480

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

5.84% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 92.5% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-09 22:03Z5 YR AGO

Last updated

2024-08-03 22:32Z2 YR AGO

Reserved

2021-04-09

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 8.5)

CNA CVSS vector

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

Weaknesses

No CWE assigned

Data version

5.1

Document digest

1c22af4d5de61c0166730a44b905286642daadb32231a756732dc37d43b0b42f

• blog.malwarebytes.comhttps://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/04/zoom-zero-day-discovery-makes-calls-safer-hackers-200000-richer/x_refsource_MISC
• twitter.comhttps://twitter.com/thezdi/status/1379855435730149378x_refsource_MISC
• twitter.comhttps://twitter.com/thezdi/status/1379859851061395459x_refsource_MISC
• zoom.ushttps://zoom.us/feature/messagingx_refsource_MISC
• www.securityweek.comhttps://www.securityweek.com/200000-awarded-zero-click-zoom-exploit-pwn2ownx_refsource_MISC
• www.zdnet.comhttps://www.zdnet.com/article/critical-zoom-vulnerability-triggers-remote-code-execution-without-user-input/x_refsource_MISC
• www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-971/x_refsource_MISC
• explore.zoom.ushttps://explore.zoom.us/en/trust/security/security-bulletin/x_refsource_MISC
• sector7.computest.nlhttps://sector7.computest.nl/post/2021-08-zoom/x_refsource_MISC