Security readout for executives and security teams
Plain-English summary
Apple fixed a high-severity web content bug where visiting or rendering malicious web content could let an attacker run code on the device. Risk is highest for fleets with unpatched iPhone, iPad, Mac, Apple TV, Vision Pro, or Apple Watch devices that handle untrusted web content.
Executive priority
Treat as high priority for Apple fleet patching, especially user-facing devices. There is no sourced evidence of active exploitation, but arbitrary code execution through web content creates credible business risk if updates lag.
Technical view
CVE-2024-27859 is described by Apple as an improved memory handling fix for arbitrary code execution when processing web content. CVSS 3.1 score is 8.8: network vector, low complexity, no privileges, user interaction required, and high confidentiality, integrity, and availability impact. The listed weakness is CWE-94.
Likely exposure
Exposure likely exists on Apple devices covered by the cited advisories if they are below iOS/iPadOS 17.4, macOS Sonoma 14.4, tvOS 17.4, visionOS 1.1, or watchOS 10.4. The source bundle does not define exact vulnerable version ranges beyond fixed releases.
Exploitation context
The bundle does not cite CISA KEV listing or any public source confirming active exploitation. Attack plausibility is still meaningful because the vector is web content processing, requires no privileges, and requires user interaction.
Researcher notes
Available sources identify affected Apple platforms, fixed releases, CVSS, and broad impact, but not a detailed root cause, vulnerable version range, proof of concept, or exploited-in-the-wild status. Avoid assuming WebKit details beyond the web content wording.
Mitigation direction
- Update affected Apple devices to the fixed OS releases or later.
- Prioritize managed devices that browse or render untrusted web content.
- Check Apple advisories for any later superseding guidance.
- Use mobile device management reporting to identify stale OS versions.
Validation and detection
- Inventory iOS, iPadOS, macOS, tvOS, visionOS, and watchOS versions.
- Confirm devices meet or exceed the fixed versions named by Apple.
- Review endpoint management compliance reports for update failures.
- Document exceptions where devices cannot receive the fixed releases.
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-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-27859 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
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:R/S:U/C:H/I:H/A:H2.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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/120881CVE reference, apple
- https://support.apple.com/en-us/120882CVE reference, apple
- https://support.apple.com/en-us/120883CVE reference, apple
- https://support.apple.com/en-us/120893CVE reference, apple
- https://support.apple.com/en-us/120895CVE 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 Control of Generation of Code ('Code Injection')
Improper Control of Generation of Code ('Code Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.