CVE-2021-30983

Name: CVE-2021-30983
Creator: NVD / NIST
Published: 2021-08-24T19:15:23.507+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 2.93%

Last modified Jun 17, 2026

CVE-2021-30983 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. CISA has confirmed active exploitation in the wild. EPSS estimates a 2.93% chance of exploitation in the next 30 days.

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

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

2.93%

85.3th 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 Jul 18, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 15.2
Apple	Iphone Os	< 15.2

References

https://support.apple.com/en-us/HT212976Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212976Release Notes, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30983US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2021-30983?

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

How severe is CVE-2021-30983?

CVE-2021-30983 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.93% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2021-30983?

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-2021-30983?

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

Scan your code now

Source: NVD / NIST