Vulnerability in Zoom Meetings

CVE-2021-34408

The Zoom Client for Meetings for Windows in all versions before version 5.3.2 writes log files to a user writable directory as a privileged user during the installation or update of the client. This could allow for potential privilege escalation if a link was created between the user writable directory used and a non-user writable directory.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (35.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-34408: held from 0.004 to 0.004.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

  • Zoom Meetings
  • Zoom Client For Meetings Windows — versions All versions of the Zoom Client for Meetings for Windows before version 5.3.2

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-34408?
CVE-2021-34408 is a high-severity vulnerability in Zoom Meetings, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2021-09-27.
How severe is CVE-2021-34408?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-34408 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.