CVE-2026-20700

Exp

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.

Published: 2026-02-11 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-20700 is rated Critical Active Threat (80.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.32%). CISA KEV confirms active exploitation (added 2026-02-12) affecting Apple / Multiple Products. a weakness (CWE-119) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2026-20700

Name: Apple Multiple Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2026-02-12

Action due: 2026-03-05

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

Exploit prediction scoring system (EPSS) score for CVE-2026-20700

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.42% 1.32% +0.90%
2 2026-06-13 0.46% 0.42% -0.03%
3 2026-06-03 — 0.46% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-20700

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-20700

Affected software / configurations for CVE-2026-20700

Vendor Product Version Raw CPE
apple ipados < 26.3 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 26.3 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple macos < 26.3 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple tvos < 26.3 cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
apple visionos < 26.3 cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
apple watchos < 26.3 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2026-20700

URL Tags
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
cvelogic Threat Intelligence