Is CVE-2020-3837 in the CISA KEV catalog?

Yes. CVE-2020-3837 is on the CISA Known Exploited Vulnerabilities list, added 2022-06-27.

What is the CVSS severity of CVE-2020-3837?

CVE-2020-3837 has a CVSS v3 base score of 7.8 (HIGH).

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

CVE-2020-3837 has an EPSS score of 16.11% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2020-3837

HIGHCISA KEVEPSS 97th pctl

7.8

CVSS v3

NVD

Description

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.

CWE-787Out-of-bounds Write

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

16.11%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apple Multiple Products Memory Corruption Vulnerability

Apple iOS, iPadOS, macOS, tvOS, and watchOS contain a memory corruption vulnerability that could allow an application to execute code with kernel privileges.

Apply updates per vendor instructions.

Remediation due: 2022-07-18

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-23.