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PatchSiren cyber security CVE debrief

CVE-2026-64740 Apple CVE debrief

A parsing issue in the handling of directory paths was addressed with improved path validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6. A malicious app may be able to break out of its sandbox. Organizations and individuals using Apple devices, especially those with high-risk exposure or critical infrastructure, should prioritize patching affected systems. This includes administrators of Apple devices in enterprise environments, IT teams managing software updates, and security teams monitoring for potential threats. Additionally, organizations with high-risk exposure or critical infrastructure should review their system configurations and implement compensating controls if necessary. The CVE record and NVD entry provide details on the vulnerability and affected products. However, further information is limited, and additional verification is recommended.

Vendor
Apple
Product
iOS and iPadOS
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-27
Original CVE updated
2026-08-17
Advisory published
2026-07-27
Advisory updated
2026-08-17

Who should care

Organizations and individuals using Apple devices, especially those with high-risk exposure or critical infrastructure, should prioritize patching affected systems. This includes administrators of Apple devices in enterprise environments, IT teams managing software updates, and security teams monitoring for potential threats. Additionally, organizations with high-risk exposure or critical infrastructure should review their system configurations and implement compensating controls if necessary.

Technical summary

A parsing issue in directory path handling was addressed with improved validation. This vulnerability, CVE-2026-64740, could allow a malicious app to break out of its sandbox. Fixes are available in iOS 18.7.10, iPadOS 18.7.10, iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, and tvOS 26.6. Organizations should verify their exposure by reviewing system configurations and software versions, and ensure that patches are applied to affected systems. Additional sources may provide further context on potential impacts and mitigations.

Defensive priority

High priority due to critical CVSS score of 9.3 and potential for sandbox escape.

Recommended defensive actions

  • Apply patches from Apple for affected products
  • Inventory and update vulnerable systems
  • Monitor for suspicious app activity
  • Implement compensating controls for high-risk systems
  • Review system configurations for potential exposure
  • Verify patch deployment and system updates
  • Track exceptions and retest remediated assets

Evidence notes

The CVE record and NVD entry provide details on the vulnerability and affected products. However, further information is limited, and additional verification is recommended. Organizations should verify their exposure by reviewing system configurations and software versions, and ensure that patches are applied to affected systems. Additional sources may provide further context on potential impacts and mitigations.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-64740 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-64740

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-64740 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-64740

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.