CVE-2026-20637

Name: CVE-2026-20637
Creator: NVD / NIST
Published: 2026-03-25T01:17:04.31+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.2/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2026-20637 is a medium-severity vulnerability rated 6.2/10 on the CVSS scale. A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An app may be able to cause unexpected system termination.

Metrics

CVSS 3.1

6.2/10

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

EPSS Probability

0.20%

9.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Apple	Ipados	< 18.7.7
Apple	Ipados	>= 26.0, < 26.3
Apple	Iphone Os	< 18.7.7
Apple	Iphone Os	>= 26.0, < 26.3
Apple	Macos	>= 14.0, < 14.8.5
Apple	Macos	>= 15.0, < 15.7.5
Apple	Macos	>= 26.0, < 26.3
Apple	Tvos	< 26.3
Apple	Visionos	< 26.3
Apple	Watchos	< 26.3

References

https://support.apple.com/en-us/126346Release Notes, Vendor Advisory
https://support.apple.com/en-us/126348Release Notes, Vendor Advisory
https://support.apple.com/en-us/126351Release Notes, Vendor Advisory
https://support.apple.com/en-us/126352Release Notes, Vendor Advisory
https://support.apple.com/en-us/126353Release Notes, Vendor Advisory
https://support.apple.com/en-us/126793Release Notes, Vendor Advisory
https://support.apple.com/en-us/126795Release Notes, Vendor Advisory
https://support.apple.com/en-us/126796Release Notes, Vendor Advisory

Timeline

Published: Mar 25, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20637?

How severe is CVE-2026-20637?

CVE-2026-20637 has a CVSS score of 6.2/10 (MEDIUM severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20637?

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-2026-20637?

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

Scan your code now

Source: NVD / NIST