CVE-2021-30881

Name: CVE-2021-30881
Creator: NVD / NIST
Published: 2021-08-24T19:15:16.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.21%

Last modified Jun 17, 2026

CVE-2021-30881 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An input validation issue was addressed with improved memory handling. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. EPSS estimates a 1.21% chance of exploitation in the next 30 days.

Description

An input validation issue was addressed with improved memory handling. This issue is fixed in iOS 15.1 and iPadOS 15.1, macOS Monterey 12.0.1, tvOS 15.1, watchOS 8.1, Security Update 2021-007 Catalina, macOS Big Sur 11.6.1. Unpacking a maliciously crafted archive may lead to arbitrary code execution.

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

1.21%

64.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 15.1
Apple	Iphone Os	< 15.1
Apple	Mac Os X	< 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.6.1
Apple	Macos	12.0
Apple	Tvos	< 15.1
Apple	Watchos	< 8.1

References

Timeline

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

Frequently Asked Questions

What is CVE-2021-30881?

How severe is CVE-2021-30881?

CVE-2021-30881 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.21% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30881?

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-2021-30881?

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

Scan your code now

Source: NVD / NIST