High severity · published Oct 16, 2020
CVE-2020-9948
A type confusion issue was addressed with improved memory handling
8.8
CVSS
1.7%
EPSS
No
On KEV
Description
A type confusion issue was addressed with improved memory handling. This issue is fixed in Safari 14.0. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.7% · higher than 77% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
SA
Safari · Apple
before 14.0 · source: NVD
WE
Webkitgtk+ · Webkit
through 2.30.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9948
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9948
Mailing List
http://seclists.org/fulldisclosure/2020/Nov/18
Mailing List
http://www.openwall.com/lists/oss-security/2020/11/23/3
Third Party Advisory
https://security.gentoo.org/glsa/202012-10
Release Notes
https://support.apple.com/HT211845
Third Party Advisory
https://www.debian.org/security/2020/dsa-4797
More from Safari
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
8.8
CVE-2025-43529
Apple Multiple Products Use-After-Free WebKit Vulnerability
8.8
CVE-2025-14174
Google Chromium Out of Bounds Memory Access Vulnerability
8.8
CVE-2023-43000
Apple Multiple products Use-After-Free Vulnerability
8.8
CVE-2025-31277
Apple Multiple Products Buffer Overflow Vulnerability