Security readout for executives and security teams
Plain-English summary
Apple fixed a directory-path validation flaw that could let an app access sensitive user data. The issue affects Apple mobile, desktop, and vision platforms, but the supplied record does not define exact vulnerable version ranges. Updating exposed devices to the listed fixed releases is the clearest risk-reduction action.
Executive priority
Treat as a high-priority confidentiality issue. Accelerate patching for devices that store sensitive data or permit third-party applications. There is no supplied evidence of active exploitation, so emergency incident response is not justified solely by this record; however, incomplete affected-version data warrants prompt inventory validation.
Technical view
CVE-2026-28876 is a path-parsing and access-control issue, classified as CWE-284. Improved path validation prevents unintended access to sensitive user data. The supplied CVSS 3.1 score is 7.5, emphasizing confidentiality loss without integrity or availability impact. Public details do not identify the affected component or exploitation prerequisites beyond the statement that an app may trigger it.
Likely exposure
Potential exposure includes Apple devices below the named fixed releases: iOS/iPadOS 18.7.7 or 26.4, macOS Sequoia 15.7.5, Sonoma 14.8.5, Tahoe 26.4, and visionOS 26.4. Exact affected version boundaries are absent, so inventory comparison and Apple guidance are required.
Exploitation context
The supplied record is not in KEV and provides no evidence of active exploitation, public proof-of-concept code, or observed attacks. It states only that an app may access sensitive user data. Exploitability in specific deployment contexts remains unclear from the available evidence.
Researcher notes
The record describes path parsing and inadequate access control but omits the vulnerable component, precise version boundaries, and attack mechanics. The CVSS vector indicates network reachability, no privileges, and no user interaction, while Apple’s description says an app may trigger access. This apparent ambiguity should be resolved against Apple’s platform advisories before exposure modeling.
Mitigation direction
- Update iOS and iPadOS devices to 18.7.7, 26.4, or an applicable later vendor-approved release.
- Update macOS Sequoia to 15.7.5, Sonoma to 14.8.5, or Tahoe to 26.4.
- Update visionOS devices to 26.4 or an applicable later vendor-approved release.
- Prioritize devices handling sensitive user data or running untrusted applications.
- Consult Apple guidance where device eligibility or supported upgrade paths are unclear.
Validation and detection
- Inventory iOS, iPadOS, macOS, and visionOS versions across managed devices.
- Confirm each device meets the applicable fixed release identified by Apple.
- Verify updates completed successfully through endpoint-management or local system records.
- Review Apple advisories for platform-specific applicability and release details.
- Document unsupported or unpatched devices for compensating-control review.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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-2026-28876 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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:N/A:N3.93.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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/126792CVE reference, apple
- https://support.apple.com/en-us/126793CVE reference, apple
- https://support.apple.com/en-us/126794CVE reference, apple
- https://support.apple.com/en-us/126795CVE reference, apple
- https://support.apple.com/en-us/126796CVE reference, apple
- https://support.apple.com/en-us/126799CVE 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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.