CVE-2021-30820Network attack vector

Remote code execution via Bluetooth state-management flaw

Published Oct 19, 2021 · Updated Aug 3, 2024

A logic flaw in the Bluetooth component of Apple iOS and iPadOS before 14.8 allows remote attackers to execute arbitrary code. The component mishandles state during remote Bluetooth processing; Apple has not disclosed the affected function or invalid transition. Exploitation requires Bluetooth-range access to a vulnerable iPhone or iPad, and successful exploitation permits code execution on the device.

CVSS severity9.8
Critical
EPSS probability2.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A logic flaw in the Bluetooth component of Apple iOS and iPadOS before 14.8 allows remote attackers to execute arbitrary code. The component mishandles state during remote Bluetooth processing; Apple has not disclosed the affected function or invalid transition. Exploitation requires Bluetooth-range access to a vulnerable iPhone or iPad, and successful exploitation permits code execution on the device.

The record

CVE
CVE-2021-30820
Published
Oct 19, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <14.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <14.8

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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