Security readout for executives and security teams
Plain-English summary
CVE-2026-64694 is a critical macOS integer-overflow flaw. Apple states that an app may trigger an unexpected system termination. Apple fixed it in current updates for macOS Sequoia, Sonoma, and Tahoe. The supplied evidence does not identify the vulnerable component or establish data theft, privilege escalation, or active exploitation.
Executive priority
Prioritize prompt enterprise patching because Apple rates the issue critical and updates are available across three supported macOS branches. Avoid claiming confirmed compromise or active exploitation. Focus first on exposed user endpoints, verify update coverage, and investigate unexplained system terminations while awaiting fuller component and exploitation details.
Technical view
The issue is classified as CWE-190: integer overflow or wraparound. Apple addressed it through improved input validation. The supplied record assigns CVSS 3.1 score 9.8, but the described outcome is unexpected system termination and technical attack-path details are absent. Treat the score cautiously until component-level evidence clarifies reachability and impact.
Likely exposure
Potential exposure includes Macs running affected, unpatched releases of macOS Sequoia, Sonoma, or Tahoe. Fixed versions are Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. The bundle's affected-version entries are placeholders, so it does not establish complete lower version boundaries or whether other macOS branches are affected.
Exploitation context
The supplied record is not listed in CISA KEV and provides no evidence of active exploitation or public exploit availability. It says an app may cause unexpected system termination, suggesting application-mediated exposure, but does not explain delivery, required execution conditions, vulnerable subsystem, or whether exploitation can exceed denial of service.
Researcher notes
Public details are sparse: integer overflow, improved input validation, and possible system termination. The affected component, input format, trust boundary, crash characteristics, and exploitability beyond denial of service are unspecified. The CVSS vector indicates network reachability and complete confidentiality, integrity, and availability impact, which is not substantiated by the supplied description; further vendor clarification is needed.
Mitigation direction
- Update Sequoia systems to macOS 15.7.8 or later.
- Update Sonoma systems to macOS 14.8.8 or later.
- Update Tahoe systems to macOS 26.6 or later.
- Check Apple guidance for unsupported or unlisted macOS branches.
- Prioritize systems that run untrusted or externally obtained applications.
Validation and detection
- Inventory deployed Macs by macOS branch and exact version.
- Flag Sequoia versions earlier than 15.7.8 for review.
- Flag Sonoma versions earlier than 14.8.8 for review.
- Flag Tahoe versions earlier than 26.6 for review.
- Confirm updates completed successfully through endpoint-management reporting.
- Monitor affected Macs for unexplained application-triggered system termination.
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-2026-64694 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/128067CVE 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.
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.