CVE-2021-30860

Name: CVE-2021-30860
Creator: NVD / NIST
Published: 2021-08-24T19:15:14.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 75.99%

Last modified Jun 17, 2026

CVE-2021-30860 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 75.99% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

75.99%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Nov 17, 2021.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 14.8
Apple	Iphone Os	< 12.5.5
Apple	Iphone Os	>= 13.0, < 14.8
Apple	Mac Os X	>= 10.15, < 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	< 11.6
Apple	Watchos	< 7.6.2
Xpdfreader	Xpdf	< 4.04
Freedesktop	Poppler	< 22.09.0

References

http://seclists.org/fulldisclosure/2021/Sep/25Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/28Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/40Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/50Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/09/02/11Mailing List
https://security.gentoo.org/glsa/202209-21Third Party Advisory
https://support.apple.com/en-us/HT212804Vendor Advisory
https://support.apple.com/en-us/HT212805Vendor Advisory
https://support.apple.com/en-us/HT212806Vendor Advisory
https://support.apple.com/en-us/HT212807Vendor Advisory
https://support.apple.com/kb/HT212824Vendor Advisory
http://seclists.org/fulldisclosure/2021/Sep/25Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/27Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/28Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/38Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/39Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/40Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Sep/50Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/09/02/11Mailing List
https://security.gentoo.org/glsa/202209-21Third Party Advisory
https://support.apple.com/en-us/HT212804Vendor Advisory
https://support.apple.com/en-us/HT212805Vendor Advisory
https://support.apple.com/en-us/HT212806Vendor Advisory
https://support.apple.com/en-us/HT212807Vendor Advisory
https://support.apple.com/kb/HT212824Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30860US Government Resource

Timeline

Published: Aug 24, 2021
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-30860?

How severe is CVE-2021-30860?

CVE-2021-30860 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 75.99% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-30860?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-30860?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST