Vulnerability · Published Nov 11, 2021 · Assigned by Zoom
CVE-2021-34420Zoom Windows installation executable signature bypass
Medium 4.7
In plain English
A medium-severity security flaw in Zoom Client for Meetings for Windows from Zoom Video Communications Inc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.4%top 64.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zoom Video Communications Inc | Zoom Client for Meetings for Windows | unspecified – before 5.5.4 |