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CVE-2021-34409

25
FAUCET Score

CVE-2021-34409 is a local privilege escalation vulnerability affecting Zoom Client for Meetings for macOS (Standard and IT Admin), Zoom Client Plugin for Sharing iPhone/iPad, and Zoom Rooms for Conference, all prior to specific versions. A local attacker could exploit this flaw during installation by manipulating shell scripts copied to a user-writable directory, allowing them to execute arbitrary commands with elevated privileges. Rated High severity (CVSS 7.8), it carries a significant risk of impact to confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.2.0CPE matchmatch criteria
cpe:2.3:a:zoom:meetings:*:*:*:*:*:macos:*:*
< 5.1.0CPE matchmatch criteria
cpe:2.3:a:zoom:rooms:*:*:*:*:*:*:*:*
< 5.2.0CPE matchmatch criteria
cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:ipados:*:*
< 5.2.0CPE matchmatch criteria
cpe:2.3:a:zoom:screen_sharing:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
9.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 35th percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

explore.zoom.us / en/trust/security/security-bulletin
Vendor Advisory