CVE-2020-9818

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. Processing a maliciously crafted mail message may lead to unexpected memory modification or application termination.

CVSS v3 8.8 HIGH
CVSS v2.0 6.8 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://support.apple.com/HT211168	Release Notes Vendor Advisory
https://support.apple.com/HT211169	Release Notes Vendor Advisory
https://support.apple.com/HT211175	Release Notes Vendor Advisory
https://support.apple.com/HT211168	Release Notes Vendor Advisory
https://support.apple.com/HT211169	Release Notes Vendor Advisory
https://support.apple.com/HT211175	Release Notes Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:apple:ipados::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:watchos::::::::

History

22 Oct 2025, 00:17

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818 -

21 Oct 2025, 20:18

Type	Values Removed	Values Added
References	~~{'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}~~

21 Oct 2025, 19:18

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9818 -

Information

Published : 2020-06-09 17:15

Updated : 2025-10-22 00:17

NVD link : CVE-2020-9818

Mitre link : CVE-2020-9818

CVE.ORG link : CVE-2020-9818

JSON object : View

Products Affected

apple

watchos
iphone_os
ipados

CWE

CWE-787

Out-of-bounds Write

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