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CVE-2021-1809

25
FAUCET Score

CVE-2021-1809 is a memory corruption vulnerability affecting Apple's iOS, iPadOS, watchOS, tvOS, and macOS operating systems, allowing a malicious application to read restricted memory. With a CVSS score of 7.5 (HIGH), it presents a significant risk due to its low attack complexity and potential for high confidentiality impact. While no active exploitation, public exploit code, or significant community discussion has been observed, organizations should prioritize patching to mitigate this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 14.5CPE matchmatch criteria
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
< 14.5CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
>= 10.14, <= 10.14.5CPE matchmatch criteria
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
>= 10.15, <= 10.15.5CPE 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

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.77%
Probability of exploitation in next 30 days
EPSS Percentile
75.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0177 is in the 59th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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/HT212317
Vendor Advisory
support.apple.com / en-us/HT212323
Vendor Advisory
support.apple.com / en-us/HT212324
Vendor Advisory
support.apple.com / en-us/HT212325
Vendor Advisory
support.apple.com / en-us/HT212326
Vendor Advisory
support.apple.com / en-us/HT212327
Vendor Advisory