CVE-2026-20700: Apple Multiple Buffer Overflow Vulnerability

CISA Known Exploited Vulnerabilities

Name

Apple Multiple Buffer Overflow Vulnerability

Vendor

Apple

Product

Multiple Products

Added to the catalog

2026-02-12

Due date for US federal agencies

2026-03-05

Weaknesses

CWE-119

Catalog version

2026.10.30

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.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://support.apple.com/en-us/126346
• https://support.apple.com/en-us/126348
• https://support.apple.com/en-us/126351
• https://support.apple.com/en-us/126352
• https://support.apple.com/en-us/126353
• https://nvd.nist.gov/vuln/detail/CVE-2026-20700

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2026-02-11T23:16:10.670

Last modified

2026-06-17T10:17:43.440

Weaknesses

CWE-119

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.

References

• 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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20700 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:22.836Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-20700

CVE record

Assigner

apple

State

PUBLISHED

Published

2026-02-11T22:58:54.448Z

Updated

2026-04-02T18:23:25.647Z

Problem types

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.

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.

References

• https://support.apple.com/en-us/126346
• https://support.apple.com/en-us/126348
• https://support.apple.com/en-us/126351
• https://support.apple.com/en-us/126352
• https://support.apple.com/en-us/126353

Read on 2026-11-03T02:19:03.672Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/20xxx/CVE-2026-20700.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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