Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2020-9951

28
FAUCET Score

CVE-2020-9951 is a use-after-free vulnerability in Safari 14.0 and earlier, affecting Apple products, Debian, and WebKit. This flaw, rated 8.8 HIGH (CVSSv3.1), allows unauthenticated attackers to achieve arbitrary code execution by enticing users to process maliciously crafted web content. While the vulnerability has a high severity and impact, there is currently no evidence of active exploitation, public exploit code, or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
< 11.5CPE matchmatch criteria
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*
< 12.10.9CPE matchmatch criteria
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*
< 14.0CPE matchmatch criteria
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
< 14.0CPE matchmatch criteria
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
< 14.0CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.33%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0233 is in the 81st percentile among its peer group of 14,848 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7 Extended Lifecycle SupportFixed in: webkitgtk4-0:2.48.3-2.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: webkit2gtk3-0:2.30.4-1.el8
View patch
applevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-9951Moderate

webkitgtk: use-after-free may lead to arbitrary code execution

Nov 23, 2020

References

seclists.org / fulldisclosure/2020/Nov/18
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Nov/19
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Nov/20
Mailing ListThird Party Advisory
seclists.org / fulldisclosure/2020/Nov/22
Mailing ListThird Party Advisory
security.gentoo.org / glsa/202012-10
Third Party Advisory
support.apple.com / HT211845
Release NotesVendor Advisory
support.apple.com / kb/HT211843
Vendor Advisory
support.apple.com / kb/HT211844
Vendor Advisory
support.apple.com / kb/HT211850
Vendor Advisory
support.apple.com / kb/HT211935
Vendor Advisory
support.apple.com / kb/HT211952
Vendor Advisory
debian.org / security/2020/dsa-4797
Third Party Advisory
openwall.com / lists/oss-security/2020/11/23/3
Mailing ListThird Party Advisory