Security readout for executives and security teams
Plain-English summary
A malicious app may escape Apple’s application sandbox by abusing improper directory-path validation. A successful escape could expose data or capabilities normally isolated from that app. Apple has fixed the issue across current iOS, iPadOS, macOS, and tvOS releases.
Executive priority
Prioritize accelerated patching across managed Apple fleets, especially privileged users and sensitive environments. The potential impact is severe, but the supplied evidence does not establish active exploitation. Track update coverage and exceptions until every supported device reaches a fixed release.
Technical view
CVE-2026-64740 is a CWE-22 path-handling weakness. Apple states that improved path validation prevents a malicious app from breaking out of its sandbox. The supplied record assigns CVSS 3.1 score 9.8, but its network, no-privilege vector does not clearly align with the described malicious-app prerequisite.
Likely exposure
Exposure includes devices running releases earlier than iOS/iPadOS 26.6, macOS Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.6, or tvOS 26.6. The bundle does not provide reliable lower-version boundaries; its affected-version entries are placeholders.
Exploitation context
The supplied bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Exploitation requires a malicious app according to Apple, but the sources do not explain how that app reaches or executes on a device.
Researcher notes
The core condition is directory-path parsing that can permit sandbox escape. Exact vulnerable version ranges, affected component, attack chain, and technical prerequisites are not disclosed. The supplied CVSS vector describes a remote, unauthenticated path inconsistent with the stated malicious-app scenario; validate scoring against future CVE or Apple revisions.
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, Tahoe 26.6, or later.
- Update Apple TV devices to tvOS 26.6 or later.
- Prioritize devices permitting untrusted applications or handling sensitive information.
- Consult Apple security guidance for unsupported releases or devices unable to update.
Validation and detection
- Inventory Apple devices and record their exact operating-system versions.
- Confirm each device meets the applicable fixed-version threshold.
- Verify updates completed successfully through device-management or local version reporting.
- Review application inventories for untrusted or unexpected software.
- Recheck Apple advisories for revised affected-version or exploitation information.
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-22: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. 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-2026-64740 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/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.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.