CVE-2021-34420

low-risk
Published 2021-11-11

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.

Do I need to act?

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0.12% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Zoom Client For Meetings

Affected Vendors

Zoom

References (4)

Vendor Advisory https://explore.zoom.us/en/trust/security/security-bulletin
Third Party Advisory https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vuln...
Vendor Advisory https://explore.zoom.us/en/trust/security/security-bulletin
Third Party Advisory https://medium.com/manomano-tech/a-red-team-operation-leveraging-a-zero-day-vuln...
25
/ 100
low-risk
Severity 19/34 · Moderate
Exploitability 1/34 · Minimal
Exposure 5/34 · Minimal