dbcve.org
IpadosOperating system · Apple

CVE-2021-30715

HIGH · 7.5 CVSS v3.1 Published 2021-09-08
Fix available
A fix is available. Upgrade to 7.5 / 11.4 or later.
See remediation →
84/100
Remediation priority · High
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
A logic issue was addressed with improved state management. This issue is fixed in tvOS 14.6, iOS 14.6 and iPadOS 14.6, Security Update 2021-003 Catalina, macOS Big Sur 11.4, watchOS 7.5. Processing a maliciously crafted message may lead to a denial of service.

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 · high confidence

A logic issue in state management in multiple Apple operating systems allows processing of maliciously crafted messages, leading to denial of service. This vulnerability affects iOS 14.6, iPadOS 14.6, tvOS 14.6, watchOS 7.5, macOS Big Sur 11.4, and Security Update 2021-003 for Catalina.

MitigationApply the available security updates: iOS 14.6/iPadOS 14.6 for mobile devices, tvOS 14.6 for Apple TV, watchOS 7.5 for Apple Watch, macOS Big Sur 11.4 or Security Update 2021-003 for Catalina for Macs.

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
IpadosOperating system
Affected:< 14.6
Iphone OsOperating system
Affected:< 14.6
Mac Os XOperating system
Affected:>= 10.15, <= 10.15.6= 10.15.7
macOSOperating system
Affected:>= 11.0, < 11.4
TvosOperating system
Affected:< 14.6
WatchosOperating system
Affected:< 7.5

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
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/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. Identify the Apple operating system
    Run 'sw_vers' on macOS, or go to Settings > General > About on iOS/iPadOS/tvOS/watchOS to see the product name and version number
    Affected if Any Apple OS product is running (iOS, iPadOS, macOS, tvOS, watchOS)
  2. Check iOS or iPadOS version
    On iPhone or iPad, go to Settings > General > About and note the Version number (e.g., 14.5)
    Affected if Version is lower than 14.6 (e.g., 14.5.x, 14.4.x, etc.)
  3. Check macOS version
    Run 'sw_vers -productVersion' in Terminal, or go to Apple menu > About This Mac > macOS version
    Affected if Version is 10.15.x (Catalina, specifically 10.15 through 10.15.7) OR version is 11.0 through 11.3.x (Big Sur before 11.4)
  4. Check tvOS version
    Go to Settings > General > About > Version on Apple TV, or check the build number
    Affected if Version is lower than 14.6 (e.g., 14.5.x, 14.4.x, etc.)
  5. Check watchOS version
    Open the Watch app on iPhone, go to My Watch > General > About, and note the watchOS version
    Affected if Version is lower than 7.5 (e.g., 7.4.x, 7.3.x, etc.)

If the detected OS version falls into any of these ranges: iOS/iPadOS < 14.6, tvOS < 14.6, watchOS < 7.5, macOS Catalina 10.15.0-10.15.7, or macOS Big Sur 11.0-11.3.x, then the environment is affected by this vulnerability.

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.

dbcve · scoped
Upgrade available Upgrade to 7.5 / 11.4 / 14.6 or later
Fixed in 7.511.414.6
Interim mitigation

Apply the available security updates: iOS 14.6/iPadOS 14.6 for mobile devices, tvOS 14.6 for Apple TV, watchOS 7.5 for Apple Watch, macOS Big Sur 11.4 or Security Update 2021-003 for Catalina for Macs.

Recommended fix High confidence

iOS/iPadOS 14.6, macOS Big Sur 11.4, Security Update 2021-003 for Catalina, tvOS 14.6, watchOS 7.5

  1. Check current device version: On iOS/iPadOS, go to Settings > General > About > Version. On macOS, go to Apple menu > About This Mac > System Report > Software Version. On tvOS, go to Settings > General > About > Version. On watchOS, go to Settings > General > About > Version.
  2. Back up your device before upgrading using iCloud or Finder/iTunes for iOS devices, or Time Machine for Macs.
  3. For iOS/iPadOS devices: Go to Settings > General > Software Update and install iOS/iPadOS 14.6
  4. For macOS Catalina (10.15.x): Go to System Preferences > Software Update and install Security Update 2021-003 Catalina
  5. For macOS Big Sur (11.0-11.3): Go to System Preferences > Software Update and install macOS Big Sur 11.4
  6. For tvOS devices: Go to Settings > General > Software Update and install tvOS 14.6
  7. For Apple Watch: On iPhone, open Watch app > General > Software Update and install watchOS 7.5
  8. After updating, verify the new version is installed by checking the version again
Caveat Major iOS/macOS updates may cause incompatibility with older applications; ensure critical apps are compatible before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Ipados Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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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-2021-30715 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