CVE-2026-20700

A memory corruption issue was addressed with improved state management. This issue is fixed in...

7.8 HighIn KEVPublic exploit

A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to this report.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

1.68%Up 1.7 points since Feb 12, 2026

What each source reports

CVE List Score used 7.8

Record: CVE-2026-20700
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

EUVDEUVD-2026-6189 7.8

Record: EUVD-2026-6189
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-j5x8-2r52-c3ff 7.8

A memory corruption issue was addressed with improved state management. This issue is fixed in...

A memory corruption issue was addressed with improved state management. This issue is fixed in watchOS 26.3, tvOS 26.3, macOS Tahoe 26.3, visionOS 26.3, iOS 26.3 and iPadOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to this report.

Record: GHSA-j5x8-2r52-c3ff
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

CISA KEV No score

Apple Multiple Buffer Overflow Vulnerability

Apple iOS, macOS, tvOS, watchOS, and visionOS contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow an attacker with memory write the capability to execute arbitrary code.

Record: CVE-2026-20700
Weakness: CWE-119
Updated: 2026-11-02

NVD 7.8

Record: CVE-2026-20700
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-119
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	R3n3r0/CVE-2026-20700	2026-05-23
PoC in GitHub	notthemystery/CVE-2026-20700-POC-that-ll-never-work	2026-05-25

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation
Nov 2, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, CISA KEV, NVD, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-20700 is a high vulnerability (CVSS 7.8) in Apple Ipados, published February 11, 2026. CISA lists it as known to be exploited, since February 12, 2026. EUVD reports exploitation since February 12, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 1.68%, the 76th percentile. No source names a fixed version.