Security readout for executives and security teams
Plain-English summary
Apple fixed an input-validation flaw that may let a local attacker alter Keychain state. Because Keychain supports credential and trust functions, unauthorized changes could affect device security. The supplied evidence does not establish credential theft, remote exploitation, or attacks in the wild.
Executive priority
Treat this as a high-priority Apple fleet update, especially for privileged users and devices exposed to untrusted local access. Accelerate normal patching, but the supplied evidence does not justify an emergency response based on active exploitation.
Technical view
CVE-2026-28860 is classified as CWE-20 and was addressed through improved input validation. Apple states that a local attacker may modify Keychain state. Fixes span supported iOS, iPadOS, macOS, tvOS, visionOS, and watchOS releases. Exact vulnerable version ranges are not provided.
Likely exposure
Potential exposure includes Apple devices below the listed fixed releases. The bundle does not define exact affected version ranges, so organizations should inventory operating-system versions and confirm applicability through the corresponding Apple advisory.
Exploitation context
The CVE is not listed as KEV, and the supplied sources do not report active exploitation or a public exploit. Absence from KEV does not prove exploitation is impossible. Apple's description requires local attacker access, but the supplied CVSS vector reports network reachability, creating uncertainty.
Researcher notes
The record contains material inconsistencies: Apple describes a local attacker modifying Keychain state, while the supplied CVSS vector indicates network access, confidentiality impact, and no integrity impact. Confirm the authoritative scoring and affected ranges before modeling attack paths or detection coverage.
Mitigation direction
- Update iOS and iPadOS to 18.7.7, 26.4, or later applicable releases.
- Update macOS Sequoia to 15.7.5, Sonoma to 14.8.5, or Tahoe to 26.4.
- Update affected tvOS, visionOS, and watchOS devices to 26.4 or later.
- Prioritize shared, privileged, or credential-sensitive devices where local access is plausible.
- Consult Apple's product-specific advisory before treating earlier versions as definitively vulnerable.
Validation and detection
- Inventory Apple devices and record their product, operating-system family, and installed version.
- Compare installed versions against Apple's listed fixed releases for each product family.
- Verify updates completed successfully through endpoint-management or device inventory records.
- Review local-access controls and investigate unexplained Keychain or security-state changes.
- Recheck Apple advisories for clarified affected ranges 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-20: 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-2026-28860 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/126797CVE reference, apple
- https://support.apple.com/en-us/126798CVE 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 Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.