What is CVE-2021-33907?

CVE-2021-33907 is a critical-severity vulnerability in Zoom Meetings, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2021-09-27.

How severe is CVE-2021-33907?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Zoom Meetings

CVE-2021-33907

The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an el…

Vulnerability class: Improper Certificate Validation

EPSS: 0.030 (85.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zoom Meetings
N/a Zoom Client For Meetings Windows — versions All versions of the Zoom Client for Meetings for Windows before version 5.3.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

security@zoom.us (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-33907?: CVE-2021-33907 is a critical-severity vulnerability in Zoom Meetings, classified under Improper Certificate Validation. CVSS score: 9.8/10. Published 2021-09-27.
How severe is CVE-2021-33907?: Critical severity. CVSS v3 base score is 9.8 out of 10.