Security readout for executives and security teams
Plain-English summary
A remotely reachable buffer overflow could crash affected Apple applications or corrupt memory. Apple fixed it across supported iPhone, iPad, Mac, Apple TV, and Vision Pro operating systems. Because the supplied record rates it CVSS 9.8, organizations should update promptly, although the bundle provides no evidence of active exploitation.
Executive priority
Treat this as an urgent fleet-patching issue because remote exploitation requires neither authentication nor user interaction according to the CVSS vector. Prioritize business-critical and externally connected devices, then verify coverage through management reporting. Escalate unsupported hardware for replacement or vendor-guided risk treatment. No active exploitation is established in the supplied evidence.
Technical view
CVE-2026-64771 is a CWE-119 bounds-checking flaw. A remote, unauthenticated attacker may cause unexpected application termination or heap corruption without user interaction. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The affected component, protocol, attack path, and exact vulnerable version ranges are not identified in the bundle.
Likely exposure
Potential exposure includes Apple devices running releases older than iOS/iPadOS 18.7.10 or 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6. Exact affected-version boundaries are missing, so confirm applicability through Apple's platform advisories and device-management inventory.
Exploitation context
The scoring indicates network reachability, low attack complexity, no privileges, and no user interaction. However, the sources supplied do not describe a working exploit, observed attacks, or technical prerequisites. The record is not marked as included in KEV, so active exploitation is not established by this bundle.
Researcher notes
The public record identifies a buffer overflow corrected through improved bounds checking, with possible heap corruption. It does not name the vulnerable component, disclose crash signatures, provide exact affected ranges, or establish code execution. CVSS implies severe confidentiality, integrity, and availability impact, but deeper exploitability conclusions would be speculative without Apple component details.
Mitigation direction
- Update iPhones and iPads to iOS/iPadOS 18.7.10 or 26.6, as applicable.
- Update Macs to macOS Sequoia 15.7.8 or macOS Tahoe 26.6.
- Update Apple TV and Vision Pro devices to tvOS 26.6 and visionOS 26.6.
- Use device management to accelerate deployment and identify systems unable to receive these releases.
- Check the relevant Apple advisory for hardware compatibility and any additional vendor guidance.
Validation and detection
- Inventory Apple operating-system versions across managed and business-critical devices.
- Confirm devices report the applicable fixed release after installation and restart.
- Investigate update failures, deferred installations, and devices missing from management coverage.
- Review Apple advisories to verify platform-specific applicability and release details.
- Monitor for unexplained application crashes, while recognizing the bundle provides no vulnerability-specific indicators.
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-119: 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-2026-64771 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/148287CVE 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.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.