CVE-2021-30815

Contact disclosure via Siri lock-screen state flaw

Published Oct 19, 2021 · Updated Aug 3, 2024

Improper access control in Siri on Apple iOS and iPadOS before 15 allows physically proximate attackers to view lock-screen contacts. The Siri lock-screen state logic permits contact access while the device remains locked instead of preserving the locked state. Physical access to a locked iPhone or iPad is required, and the documented consequence is limited to viewing stored contact information.

CVSS severity2.4
Low
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Siri on Apple iOS and iPadOS before 15 allows physically proximate attackers to view lock-screen contacts. The Siri lock-screen state logic permits contact access while the device remains locked instead of preserving the locked state. Physical access to a locked iPhone or iPad is required, and the documented consequence is limited to viewing stored contact information.

The record

CVE
CVE-2021-30815
Published
Oct 19, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1636.003
Attack vector
physical
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 <15

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
2.4NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1636.003Protected User Data: Contact List

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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