Security readout for executives and security teams
Plain-English summary
A remotely reachable integer overflow in multiple Apple operating systems can crash an application or corrupt heap memory. The supplied record rates it critical, but does not identify the affected component or confirm code execution. Apple has released corrected operating-system versions.
Executive priority
Prioritize accelerated patching across managed Apple fleets because remote heap corruption can create serious availability and security risk. Address externally exposed or high-value systems first. Immediate emergency action beyond patching is not supported by evidence of active exploitation in the supplied sources.
Technical view
CVE-2026-64774 is CWE-190 integer overflow addressed through improved input validation. The supplied CVSS 3.1 score is 9.8, reflecting network access without privileges or user interaction and potentially severe impact. Public details only confirm possible unexpected application termination or heap corruption; the vulnerable component and precise affected-version ranges are unspecified.
Likely exposure
Potential exposure exists on iOS, iPadOS, macOS, tvOS, and visionOS systems that have not installed the listed fixed releases. The bundle provides unusable affected-version entries, so exact vulnerable ranges cannot be determined from these sources alone.
Exploitation context
The bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Remote triggering is stated, but the protocol, vulnerable service, application, and required traffic path are not disclosed. Treat exploitation status as unconfirmed.
Researcher notes
The record lacks the affected component, parsing context, root-cause detail, exact vulnerable ranges, crash artifacts, and confirmation that heap corruption enables code execution. The CVSS vector indicates no privileges or user interaction, but independent exploitability cannot be assessed from the supplied evidence.
Mitigation direction
- Update iOS and iPadOS to 18.7.10 or 26.6, as applicable.
- Update macOS to Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6.
- Update affected Apple TV and Vision Pro devices to tvOS or visionOS 26.6.
- Check Apple security guidance for model eligibility and any newly published mitigations.
Validation and detection
- Inventory deployed iOS, iPadOS, macOS, tvOS, and visionOS versions.
- Confirm devices report the applicable fixed release or a later vendor-supported release.
- Review update-management failures and isolate devices unable to receive a fixed release.
- Monitor Apple advisories and the CVE record for component, version-range, and exploitation updates.
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-190: 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-2026-64774 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
- 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.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.