How severe is CVE-2020-9819?

CVE-2020-9819 has a CVSS 3.1 base score of 4.3 (MEDIUM). EPSS estimates a 2.2% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2020-9819: Apple iOS, iPadOS, and watchOS Memory Corruption

CISA Known Exploited Vulnerabilities

Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2021-11-03

Remediation due

2022-05-03

Required action
Apply updates per vendor instructions.

CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2020-9819

Description

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5, watchOS 5.3.7. Processing a maliciously crafted mail message may lead to heap corruption.

Severity

CVSS 3.1 · CISA4.3 MEDIUM

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

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Affected Products

Vendor	Product	Affected versions
Apple	iOS	unspecified to <iOS 13.5 and iPadOS 13.5
Apple	iOS-1	unspecified to <iOS 12.4.7
Apple	watchOS	unspecified to <watchOS 6.2.5
Apple	watchOS-1	unspecified to <watchOS 5.3.7

References

4 Links

Other references

Record Details

Published

2020-06-09

Last updated

2025-12-20

Assigner (CNA)

apple

Credited to

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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.