Root privilege escalation in macOS UserAccountUpdater
CVE-2026-28976 is a local privilege escalation vulnerability in the UserAccountUpdater component on macOS Tahoe. According to the provided Apple advisory text, the issue is described as an information leakage flaw that was addressed with additional validation. Successful exploitation may allow an application to gain root privileges. The available content does not identify the specific vulnerable function, code path, or exact leaked information, but it indicates that insufficient validation in UserAccountUpdater allowed an information disclosure condition that could be leveraged for privilege escalation.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A privilege escalation vulnerability in UserAccountUpdater that may allow an app to gain root privileges.
An information leakage vulnerability in macOS Tahoe that may allow an app to gain root privileges.
An information leakage vulnerability in macOS Tahoe that could allow an app to gain root privileges.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.