Security readout for executives and security teams
Plain-English summary
Apple fixed a memory-safety flaw that a remote attacker may be able to trigger without authentication or user interaction. Successful attacks could crash an application or corrupt heap memory, potentially threatening confidentiality, integrity, and availability. The supplied evidence does not identify the affected component or confirm exploitation in the wild.
Executive priority
Prioritize accelerated patching across internet-connected and high-value Apple devices. The 9.8 score and remote, no-interaction profile justify urgent action, although active exploitation is not established. Request rapid fleet coverage reporting and documented exceptions for devices unable to receive the listed updates.
Technical view
CVE-2026-64770 is a CWE-787 out-of-bounds write addressed through improved bounds checking. It carries CVSS 3.1 score 9.8 with network reachability, low complexity, no privileges, and no user interaction. Apple reports possible unexpected application termination or heap corruption. Exact affected version ranges and the vulnerable component are not provided.
Likely exposure
Potential exposure exists across managed or unmanaged iPhone, iPad, Mac, Apple TV, and Vision Pro fleets not running the stated fixed releases. The sources do not provide precise vulnerable-version ranges, affected hardware models, or service-specific exposure conditions, so inventory findings should be checked against Apple advisories.
Exploitation context
The source bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Its remote, unauthenticated, no-interaction CVSS characteristics make it operationally serious, but practical exploitability cannot be confirmed without component details or additional vendor analysis.
Researcher notes
The record supplies a weakness class, impact description, fixed releases, and CVSS vector, but omits the affected component, attack surface, vulnerable-version boundaries, and root-cause detail. Heap corruption suggests potential impact beyond denial of service, but code execution should not be claimed from the available evidence.
Mitigation direction
- Update iPhones and iPads to iOS or iPadOS 26.6 or later.
- Update Macs to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6, as applicable.
- Update Apple TV and Vision Pro devices to tvOS 26.6 and visionOS 26.6, respectively.
- Check Apple advisories for device compatibility, deployment sequencing, and later superseding releases.
Validation and detection
- Inventory all deployed devices running iOS, iPadOS, macOS, tvOS, or visionOS.
- Compare installed versions with the fixed releases stated by Apple.
- Confirm update deployment through device-management reporting and investigate failed or excluded devices.
- Review application crash telemetry for unexplained terminations, without treating crashes alone as proof of exploitation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-64770 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/128066CVE reference, apple
- https://support.apple.com/en-us/128067CVE reference, apple
- https://support.apple.com/en-us/128069CVE reference, apple
- https://support.apple.com/en-us/128070CVE reference, apple
- https://support.apple.com/en-us/128071CVE reference, apple
- https://support.apple.com/en-us/128072CVE reference, apple
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.