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CVE-2020-9978

17
FAUCET Score

CVE-2020-9978 is a medium-severity vulnerability affecting Apple's iOS, iPadOS, macOS, and watchOS that could allow a privileged network attacker to unexpectedly alter application state. The attack requires high privileges and is of low complexity, but does not impact confidentiality or availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE. The issue was addressed with improved setting propagation in various Apple operating system updates.

Impacted Technologies

VendorProductVersion(s)CPE
< 14.0CPE matchmatch criteria
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
< 14.0CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
>= 10.14, < 10.14.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
>= 10.15, < 10.15.7CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
10.14.6CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.52%
Probability of exploitation in next 30 days
EPSS Percentile
41.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0052 is in the 35th percentile among its peer group of 399 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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/HT211843
Vendor Advisory
support.apple.com / en-us/HT211844
Vendor Advisory
support.apple.com / en-us/HT211850
Vendor Advisory
support.apple.com / en-us/HT211931
Vendor Advisory
support.apple.com / en-us/HT212011
Vendor Advisory