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Iphone OsOperating system · Apple

CVE-2016-4722

MEDIUM · 5.9 CVSS v3.0 Published 2016-09-25
Fix available
A fix is available. Upgrade to after 10.11.6 or later.
See remediation →
68/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The IDS - Connectivity component in Apple iOS before 10 and OS X before 10.12 allows man-in-the-middle attackers to conduct Call Relay spoofing attacks and cause a denial of service via unspecified vectors.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A man-in-the-middle vulnerability in the IDS (Identity Services/Connectivity) component of iOS before version 10 and OS X before version 10.12 allows attackers on the same network to spoof Call Relay connections and cause denial of service by intercepting and manipulating unspecified network traffic between the device and Apple's services.

MitigationUpdate affected iOS devices to version 10 or later and macOS systems to version 10.12 (Sierra) or later to receive the security patches for this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Iphone OsOperating system
Affected:<= 9.3.5
Mac Os XOperating system
Affected:<= 10.11.6

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check iOS version on iPhone or iPad
    Open Settings > General > About and look at the 'Version' field
    Affected if Version displays 9.3.5 or lower (for example, 9.3.4, 9.3.3, etc.)
  2. Check macOS version on Apple computers
    Click the Apple menu > About This Mac and look at the 'Version' field
    Affected if Version displays 10.11.6 or lower (for example, 10.11.5, 10.11.4, etc.)
  3. Confirm device is using IDS/Connectivity services
    The IDS (Identity Services) component handles Call Relay and network connections to Apple services; this is active by default on iOS and OS X devices that connect to Apple services like iCloud, FaceTime, or iMessage
    Affected if Device runs the vulnerable iOS or macOS version AND connects to Apple network services

A user is affected if their device runs iOS 9.3.5 or earlier, or macOS 10.11.6 or earlier, and uses network connectivity to Apple services.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to a release after 10.11.6
Interim mitigation

Update affected iOS devices to version 10 or later and macOS systems to version 10.12 (Sierra) or later to receive the security patches for this vulnerability.

Fix this in Iphone Os Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,800
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2016-4722 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data