CVE-2020-27906

Name: CVE-2020-27906
Creator: NVD / NIST
Published: 2020-12-08T21:15:13.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.85%

Last modified Jun 17, 2026

CVE-2020-27906 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Multiple integer overflows were addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1. EPSS estimates a 2.85% chance of exploitation in the next 30 days.

Description

Multiple integer overflows were addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1. A remote attacker may be able to cause unexpected application termination or heap corruption.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

2.85%

84.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apple	Macos	< 11.0.1

References

http://seclists.org/fulldisclosure/2020/Dec/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/kb/HT212011Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/26Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/kb/HT212011Vendor Advisory

Timeline

Published: Dec 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27906?

How severe is CVE-2020-27906?

CVE-2020-27906 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.85% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27906?

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-2020-27906?

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

Scan your code now

Source: NVD / NIST