What is CVE-2021-34420?

CVE-2021-34420 is a medium-severity vulnerability in Zoom Client For Meetings, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.7/10. Published 2021-11-11.

How severe is CVE-2021-34420?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Zoom Client For Meetings

CVE-2021-34420

The Zoom Client for Meetings for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer.

EPSS: 0.004 (32.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.

Affected products

Zoom Zoom_client_for_meetings
Zoom Video Communications Inc Client For Meetings Windows — versions unspecified

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

security@zoom.us (x_refsource_MISC, Vendor Advisory)
security@zoom.us (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-34420?: CVE-2021-34420 is a medium-severity vulnerability in Zoom Client For Meetings, classified under Improper Verification of Cryptographic Signature. CVSS score: 4.7/10. Published 2021-11-11.
How severe is CVE-2021-34420?: Medium severity. CVSS v3 base score is 4.7 out of 10.