Is CVE-2020-3837 being actively exploited?

Yes. CVE-2020-3837 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on June 27, 2022.

What is the CVSS score for CVE-2020-3837?

CVE-2020-3837 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2020-3837

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 14.8%EU EUVD: exploited

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. An application may be able to execute arbitrary code with kernel privileges.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 14.8% (97th percentile)
In CISA KEV: Yes, added June 27, 2022
In EU EUVD: Yes (EUVD-2020-25102)
Published: February 27, 2020
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple Multiple Products Memory Corruption Vulnerability

Added to the KEV catalog on June 27, 2022; federal remediation due July 18, 2022.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2020-25102 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 21, 2025.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / mac os x
apple / tvos
apple / watchos

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Apple Mac OS X 10.6 - Apple Inc. - Common Criteria BSI-DSZ-CC-0536-2010 - archived
Apple Mac OS X v10.3.6 and Apple Mac OS X Server V10.3.6 - Apple Inc. - Common Criteria CCEVS-VR-0086-2005 - archived

References

https://support.apple.com/HT210918(Release Notes, Vendor Advisory)
https://support.apple.com/HT210919(Release Notes, Vendor Advisory)
https://support.apple.com/HT210920(Release Notes, Vendor Advisory)
https://support.apple.com/HT210921(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3837(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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