CVE-2024-54536

Unauthorized NVRAM modification via environment variables

Published Jan 27, 2025 · Updated Apr 2, 2026

Improper validation in MobileAccessoryUpdater in Apple macOS before 15.2 allows local users to edit NVRAM variables through an app. The component inadequately validates environment variables before using them for protected NVRAM writes, allowing app-supplied values to reach the write operation. A low-privileged local app is required, and the established consequence is unauthorized NVRAM modification rather than code execution or data disclosure.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper validation in MobileAccessoryUpdater in Apple macOS before 15.2 allows local users to edit NVRAM variables through an app. The component inadequately validates environment variables before using them for protected NVRAM writes, allowing app-supplied values to reach the write operation. A low-privileged local app is required, and the established consequence is unauthorized NVRAM modification rather than code execution or data disclosure.

The record

CVE
CVE-2024-54536
Published
Jan 27, 2025
Updated
Apr 2, 2026
Vendor
Apple
Product
macOS
Classifications
T1542
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <15.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · macOSversion=0 <15.2

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1542Pre-OS Boot

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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