Security readout for executives and security teams
Plain-English summary
This macOS flaw could let a local app overwrite files it should not control. Apple says improved path validation fixes it in macOS Sequoia 15.2, Sonoma 14.7.2, and Ventura 13.7.2. The main business risk is endpoint integrity, especially where users can run untrusted apps.
Executive priority
Treat this as a normal-priority endpoint patching issue, not an emergency. It can affect file integrity on Macs, but the provided evidence does not indicate remote exploitation or known active abuse.
Technical view
CVE-2024-54520 is a local, user-interaction-required macOS path handling vulnerability with high integrity impact. Apple describes the outcome as arbitrary file overwrite by an app. The CVSS vector is 5.5, AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N. The bundle lists CWE-787, though Apple’s text emphasizes path validation.
Likely exposure
Exposure is limited to macOS systems below Sequoia 15.2, Sonoma 14.7.2, or Ventura 13.7.2. Risk is higher on endpoints where users can install or launch non-standard local applications.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. Exploitation requires a local app and user interaction, not remote unauthenticated network access. The cited impact is arbitrary file overwrite.
Researcher notes
Apple attributes the fix to improved validation for a path handling issue. The CVE bundle does not provide deeper component detail, proof-of-concept status, or exact vulnerable build ranges beyond fixed macOS releases. Avoid assuming broader Apple platform exposure.
Mitigation direction
- Update macOS Sequoia systems to 15.2 or later.
- Update macOS Sonoma systems to 14.7.2 or later.
- Update macOS Ventura systems to 13.7.2 or later.
- Check Apple guidance for any unsupported or exception-managed Macs.
- Prioritize shared, developer, and admin-used Macs for remediation.
Validation and detection
- Inventory macOS versions across managed endpoints.
- Confirm no Sequoia systems remain below 15.2.
- Confirm no Sonoma systems remain below 14.7.2.
- Confirm no Ventura systems remain below 13.7.2.
- Review MDM or patch reports for failed update installs.
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-787: 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-2024-54520 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/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/121839CVE reference, apple
- https://support.apple.com/en-us/121840CVE reference, apple
- https://support.apple.com/en-us/121842CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.