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Apple · Memory corruption

Apple Multiple Buffer Overflow Vulnerability

CVE-2026-20700

What this means

This is rated high severity (7.8 out of 10). It is on the known-exploited catalogue, which means attacks using it have already been seen. Ask IT whether Apple Ipados, Apple Iphone Os and Apple Macos, and 3 more are in your estate, and treat that as the priority.

Full vendor description

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.

Scoring and exploitation

7.8/ 10
CVSS 3.1 base scoreHigh

Exploitable only with local access and a low-privilege account, and no one has to click or open anything. High impact on confidentiality, integrity and availability.

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

Exploitability

Longer bar: easier to attack

Attack vectorLocalAV:L
Attack complexityLowAC:L
Privileges requiredLowPR:L
User interactionNoneUI:N
ScopeUnchangedS:U

Impact

Longer bar: more harm

ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityHighA:H
~1.7% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
Exploited in the wild
Yes — confirmed exploitation (US CISA )
Not reported
Listed product
Apple Multiple Products

Weaknesses

CWE-119

Affected products ()

  • Apple Ipados
  • Apple Iphone Os
  • Apple Macos
  • Apple Tvos
  • Apple Visionos
  • Apple Watchos
Show the raw CPE strings (6)
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References

6 links from the CVE record, grouped by site; the vendor's advisory comes first.

Related feed events

  • Apple Multiple Buffer Overflow Vulnerability

    Type 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…

    Next step: Confirm whether Apple Multiple Products is in your estate.

    Who's reporting

    1 of 3 perspectives

    Official authority: Official 1Vendor statement missing. no VendorResearcher coverage missing. no Researcher1 signal

    Only official coverage so far. Treat as an early signal.

    Apple Multiple Products
    CVE-2026-20700