CVE-2026-20637
Apple iOS Use After Free Memory Corruption Vulnerability
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.
INFO
Published Date :
March 25, 2026, 1:17 a.m.
Last Modified :
March 25, 2026, 8:51 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-20637
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update iOS and iPadOS to 18.7.7 or 26.3.
- Update macOS to Sequoia 15.7.5 or Sonoma 14.8.5 or Tahoe 26.3.
- Update tvOS, visionOS, and watchOS to 26.3.
Public PoC/Exploit Available at Github
CVE-2026-20637 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20637.
| URL | Resource |
|---|---|
| https://support.apple.com/en-us/126346 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126348 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126351 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126352 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126353 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126793 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126795 | Release Notes Vendor Advisory |
| https://support.apple.com/en-us/126796 | Release Notes Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20637 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20637
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2026-20637: AppleSEPKeyStore Use-After-Free — iOS/macOS kernel vulnerability (patched in 26.4)
ios kernel macos security-research use-after-free cve-2026-20637
Objective-C
TOP All bugbounty pentesting CVE-2023- POC Exp RCE example payload Things
bugbounty cve exp exploit payload poc rce vulnerability
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20637 vulnerability anywhere in the article.
-
CybersecurityNews
Apple Expands iOS 18.7.7 Update to More Devices to Shield Users from DarkSword Exploit
Apple has taken the rare step of expanding the availability of iOS 18.7.7 and iPadOS 18.7.7 to a broader set of devices on April 1, 2026, pushing critical backported security patches to millions of us ... Read more
The following table lists the changes that have been made to the
CVE-2026-20637 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Reanalysis by [email protected]
Mar. 25, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 15.0 up to (excluding) 15.7.5 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions up to (excluding) 14.8.5 OR *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 14.0 up to (excluding) 14.8.5 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 15.0 up to (excluding) 15.7.5 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 -
Initial Analysis by [email protected]
Mar. 25, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* versions up to (excluding) 26.3 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 26.0 up to (excluding) 26.3 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions from (including) 15.0 up to (excluding) 15.7.5 *cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 *cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* versions up to (excluding) 18.7.7 *cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* versions up to (excluding) 14.8.5 Added Reference Type Apple Inc.: https://support.apple.com/en-us/126346 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126348 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126351 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126352 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126353 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126793 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126795 Types: Release Notes, Vendor Advisory Added Reference Type Apple Inc.: https://support.apple.com/en-us/126796 Types: Release Notes, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-416 -
New CVE Received by [email protected]
Mar. 25, 2026
Action Type Old Value New Value Added 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. Added Reference https://support.apple.com/en-us/126346 Added Reference https://support.apple.com/en-us/126348 Added Reference https://support.apple.com/en-us/126351 Added Reference https://support.apple.com/en-us/126352 Added Reference https://support.apple.com/en-us/126353 Added Reference https://support.apple.com/en-us/126793 Added Reference https://support.apple.com/en-us/126795 Added Reference https://support.apple.com/en-us/126796