Description
An insecure PIN derivation mechanism in ABR allows a low-privileged user to escalate privileges to administrator by communicating over Cross-Process Communication (XPC) while masquerading as an Apple-signed process.
Published: 2026-08-26
Score: 8.8 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The flaw is an insecure PIN derivation mechanism that allows a low‑privileged user to impersonate an Apple‑signed process via Cross‑Process Communication (XPC). This mishandling of authentication can lead to full administrator access, enabling the attacker to modify system settings, install software, or exfiltrate data. The weakness stems from improper handling of process identity, aligned with a typical authorization flaw.

Affected Systems

Admin By Request (ABR) on all unwary versions; the exact version list was not provided, so users should verify they are running the latest release as recommended.

Risk and Exploitability

With a CVSS score of 8.8, the vulnerability is considered high severity. The EPSS score is not available, suggesting that the actual exploitation probability could be modest until an exploit is released. It is not listed in the CISA KEV catalog. The likely attack vector is local; an attacker must be able to send crafted XPC messages and masquerade as a signed process. The exploitation steps are not trivially generic, but once the attacker can forge XPC traffic, privilege escalation to administrator follows almost immediately.

Generated by OpenCVE AI on August 26, 2026 at 08:21 UTC.

Remediation

Vendor Solution

Users and administrators of affected product versions are advised to update to the latest version promptly.


OpenCVE Recommended Actions

  • Apply the latest ABR patch as issued by the vendor.
  • Restrict XPC interactions to authenticated, Apple‑signed processes only, if the system configuration allows.
  • Monitor system logs for anomalous XPC activity targeting ABR and investigate suspicious entries promptly.

Generated by OpenCVE AI on August 26, 2026 at 08:21 UTC.

Tracking

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Advisories

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History

Wed, 26 Aug 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-284

Wed, 26 Aug 2026 07:45:00 +0000

Type Values Removed Values Added
Description An insecure PIN derivation mechanism in ABR allows a low-privileged user to escalate privileges to administrator by communicating over Cross-Process Communication (XPC) while masquerading as an Apple-signed process.
Title Insecure PIN derivation mechanism in Admin By Request (ABR)
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: CSA

Published:

Updated: 2026-08-26T07:26:15.634Z

Reserved: 2026-08-24T03:00:17.827Z

Link: CVE-2026-78236

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T08:30:03Z

Weaknesses