High 7.8Known exploited (CISA KEV)Published Aug 24, 2021

CVE-2021-30860An integer overflow was addressed with improved input validation.

Updated under an hour ago (Oct 27, 2026, 10:40 AM ET)

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It affects Apple macOS and 7 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by Nov 17, 2021. Treat that date as your deadline.

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Every CVE for Apple macOS

Exploited in the last 30 days

An integer overflow was addressed with improved input validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. Processing a maliciously crafted PDF may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

CVSS: 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190
Known exploited: Added to CISA KEV Nov 3, 2021; federal remediation due Nov 17, 2021Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 75.99% (percentile 100)
Assigned by: apple
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apple macOS apple:macos (from the name)	from unspecified before 11.6	CNA record
Apple watchOS apple:watchos (from the name)	from unspecified before 7.6	CNA record
Apple iOS apple:ios (from the name)	from unspecified before 14.8	CNA record
apple ipados apple:ipados	before 14.8	NVD
apple iphone_os apple:iphone_os	before 12.5.5; from 13.0 before 14.8	NVD
apple mac_os_x apple:mac_os_x	from 10.15 before 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7	NVD
apple macos apple:macos	before 11.6	NVD
apple watchos apple:watchos	before 7.6.2	NVD
xpdfreader xpdf xpdfreader:xpdf	before 4.04	NVD
freedesktop poppler freedesktop:poppler	before 22.09.0	NVD

References

References

https://support.apple.com/en-us/HT212804	x-refsource-misc, vendor-advisory
https://support.apple.com/en-us/HT212805	x-refsource-misc, vendor-advisory
https://support.apple.com/en-us/HT212807	x-refsource-misc, vendor-advisory
https://support.apple.com/en-us/HT212806	x-refsource-misc, vendor-advisory
http://seclists.org/fulldisclosure/2021/Sep/28	mailing-list, x-refsource-fulldisc, third-party-advisory
http://seclists.org/fulldisclosure/2021/Sep/27	mailing-list, x-refsource-fulldisc, third-party-advisory
http://seclists.org/fulldisclosure/2021/Sep/25	mailing-list, x-refsource-fulldisc, third-party-advisory
http://seclists.org/fulldisclosure/2021/Sep/26	mailing-list, x-refsource-fulldisc, third-party-advisory
http://seclists.org/fulldisclosure/2021/Sep/40	mailing-list, x-refsource-fulldisc, third-party-advisory
http://seclists.org/fulldisclosure/2021/Sep/38	mailing-list, x-refsource-fulldisc, third-party-advisory
1–10 of 16

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.