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CVE-2021-30751

20
FAUCET Score

CVE-2021-30751 is a macOS Big Sur vulnerability that allows a malicious application to bypass certain Privacy preferences. It has a medium severity CVSS score of 5.5, indicating a low attack complexity requiring user interaction, but potentially leading to high integrity impact. While there is no known active exploitation, public exploit code, or KEV listing, the vulnerability has received some community discussion and media coverage, suggesting awareness within the security community. The issue was addressed with improved data protection in macOS Big Sur 11.4.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.4CPE match
cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:*
>= 11.0, < 11.4CPE matchmatch criteria
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 59th percentile among its peer group of 5,765 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

support.apple.com / en-us/HT212529
Vendor Advisory