No exploitation reportedFix available

CVE-2020-9961

Q: Is CVE-2020-9961 actively exploited?

Active exploitation of CVE-2020-9961 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-9961?

CVE-2020-9961 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2020-10-27
Fixed in10.15.7 · 10.14.6 · 10.13.6
WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.7, Security Update 2020-005 High Sierra, Security Update 2020-005 Mojave. Processing a maliciously crafted image may lead to arbitrary code execution.

Timeline

dates in UTC

2020-10-2721:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-9961?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-9961?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple mac os x

Branch	Affected	Fixed in	Source
10.15	≥ 10.15, < 10.15.7	10.15.7	NVD
10.14	≥ 10.14, < 10.14.6	10.14.6	NVD
10.13	≥ 10.13, < 10.13.6	10.13.6	NVD
10.13	= 10.13.6	no fix published	NVD
10.14	= 10.14.6	no fix published	NVD

Apple icloud

Branch	Affected	Fixed in	Source
11.5	< 11.5	11.5	NVD

Apple ipados

Branch	Affected	Fixed in	Source
14.0	< 14.0	14.0	NVD

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apple mac os x to 10.15.7 · 10.14.6 · 10.13.6

Advisories and patches

support.apple.comRelease Notes · Vendor Advisory
support.apple.comVendor Advisory
support.apple.comVendor Advisory
support.apple.comVendor Advisory
support.apple.comVendor Advisory
support.apple.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-125read 2026-10-23
FIRST EPSSEPSS score1.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2020-10-27
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-9961?

Is CVE-2020-9961 actively exploited?

Active exploitation of CVE-2020-9961 has not been confirmed. Its EPSS score was 1.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-9961?

CVE-2020-9961 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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