Medium

User fingerprinting issue in Apple Installer

IdentifiersCVE-2025-43444CWE-200

CVE-2025-43444 is a permissions/privacy issue in Apple Installer that could allow a local app to fingerprint the user. Apple states the issue was addressed with additional restrictions and fixed in tvOS 26.1, watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, iOS 18.7.2 and iPadOS 18.7.2, and visionOS 26.1. Based on the available advisory text, the flaw permits an application to derive device- or user-distinguishing characteristics sufficient for fingerprinting, but Apple has not publicly disclosed the specific vulnerable function or implementation details.

For your environment

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ANALYST BRIEF

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.

Successful exploitation allows an app to fingerprint the user, undermining platform privacy protections. This can enable persistent or semi-persistent identification of a user or device across app sessions and potentially support tracking, correlation of activity, or deanonymization, even where direct identifiers are restricted.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure by limiting installation and execution of untrusted or unnecessary apps, enforcing application allowlisting where available, and using MDM or enterprise controls to restrict sideloading or nonessential software. Because the issue is a local app privacy weakness, mitigation is primarily operational; no specific vendor-provided workaround beyond updating is provided in the available content.

Remediation

Patch, then assume compromise.

Apply the vendor fixes by updating affected devices to tvOS 26.1, watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, iOS 18.7.2 and iPadOS 18.7.2, or visionOS 26.1, as applicable. Apple indicates the issue was remediated by imposing additional restrictions in the affected component.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

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.

VendorProductType

AppleIpadosoperating_system

AppleIphone Osoperating_system

AppleTvosoperating_system

AppleVisionosoperating_system

AppleWatchosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

5 SOURCESView more in app

zdnet zero dayNews

Jan 24, 2026

About the security content of iOS 26.1 and iPadOS 26.1 - Apple Support

Permissions issue enabling user fingerprinting.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity4