Insecure PIN derivation mechanism in Admin By Request (ABR)

published 2026-08-26 2 mo ago modified 2026-09-03 2 mo ago also EUVD-2026-66331

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits: 0; none known

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.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 mo ago (2026-08-26)

Exploit prediction

0.10% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Admin By Request (ABR) Admin By Request (ABR)

Classification

Weakness

CWE-287 Improper Authentication
CWE-285 Improper Authorization
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-284 Improper Access Control

References

Sources

CVE List CVE-2026-78236
NVD CVE-2026-78236

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary