No exploitation reportedFix available

CVE-2021-30847

Q: Is CVE-2021-30847 actively exploited?

Active exploitation of CVE-2021-30847 has not been confirmed. Its EPSS score was 3.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-30847?

CVE-2021-30847 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.

Published2021-10-19

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

This issue was addressed with improved checks. This issue is fixed in watchOS 8, macOS Big Sur 11.6, Security Update 2021-005 Catalina, tvOS 15, iOS 15 and iPadOS 15, iTunes 12.12 for Windows. Processing a maliciously crafted image may lead to arbitrary code execution.

Timeline

dates in UTC

2021-10-1914:15CVE 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-2021-30847?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-30847?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, ≤ 10.15.6	no fix published	NVD
10.15	= 10.15.7	no fix published	NVD

Apple ipados

Branch	Affected	Fixed in	Source
15.0	< 15.0	15.0	NVD

Apple iphone os

Branch	Affected	Fixed in	Source
15.0	< 15.0	15.0	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

Advisories and patches

seclists.orgRelease Notes
seclists.orgRelease Notes
seclists.orgRelease Notes
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor 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
FIRST EPSSEPSS score3.0 %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: 2021-10-19
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-30847?

Is CVE-2021-30847 actively exploited?

Active exploitation of CVE-2021-30847 has not been confirmed. Its EPSS score was 3.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-30847?

CVE-2021-30847 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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