Is CVE-2020-9806 in the CISA KEV catalog?

No. CVE-2020-9806 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-9806?

CVE-2020-9806 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2020-9806?

CVE-2020-9806 has an EPSS score of 1.73% (75th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-9806?

Upgrade webkit2gtk on debian 11 to 2.28.3-1 or later. Fixes are available for 19 affected products.

CVE & CISA-KEV Catalog

CVE-2020-9806

HIGHEPSS 75th pctl

8.8

CVSS v3

NVD

Description

A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 13.5 and iPadOS 13.5, tvOS 13.4.5, watchOS 6.2.5, Safari 13.1.1, iTunes 12.10.7 for Windows, iCloud for Windows 11.2, iCloud for Windows 7.19. Processing maliciously crafted web content may lead to arbitrary code execution.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

webkit2gtkDebian

Fixed in:2.28.3-1CVE-2020-9806

webkitgtk4Red Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4Rocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-debuginfoRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-debuginfoRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-develRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-develRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-docRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-docRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jscRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jscRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jsc-develRed Hat / RHEL

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

webkitgtk4-jsc-develRocky

Fixed in:0:2.48.3-2.el7_9RHSA-2025:10364

libjavascriptcoregtk-4.0-18Ubuntu

Fixed in:2.28.3-0ubuntu0.18.04.1USN-4422-1

Fixed in:2.28.3-0ubuntu0.20.04.1USN-4422-1

libwebkit2gtk-4.0-37Ubuntu

Fixed in:2.28.3-0ubuntu0.18.04.1USN-4422-1

Fixed in:2.28.3-0ubuntu0.20.04.1USN-4422-1

webkit2gtkUbuntu

Fixed in:2.28.3-0ubuntu0.18.04.1USN-4422-1

Fixed in:2.28.3-0ubuntu0.20.04.1USN-4422-1

SafariWindows application

Affected:13.1.1Fixed in:13.1.1Apple Inc.

iCloud (Legacy)Windows application

Affected:7.19Fixed in:7.19Apple Inc.

Affected:11.0 11.2Fixed in:11.2Apple Inc.

iTunesWindows application

Affected:12.10.7Fixed in:12.10.7Apple Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.73%probability of exploitation in 30 days

75thpercentile

Elevated risk: more likely to be exploited than 75% of all known CVEs.

References

Vendor Advisory7

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.