CVE-2021-30875

Contact disclosure via lock-screen state confusion

Published Aug 24, 2021 · Updated Aug 3, 2024

Information disclosure in Siri in Apple iOS and iPadOS before 15.1 allows local users to view contacts from the lock screen. Siri's lock-screen state management permits contact access while the device remains locked; Apple has not published the exact request sequence or failing state transition. The attacker requires local access to the locked device, and the documented consequence is limited to viewing contacts.

CVSS severity3.3
Low
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Siri in Apple iOS and iPadOS before 15.1 allows local users to view contacts from the lock screen. Siri's lock-screen state management permits contact access while the device remains locked; Apple has not published the exact request sequence or failing state transition. The attacker requires local access to the locked device, and the documented consequence is limited to viewing contacts.

The record

CVE
CVE-2021-30875
Published
Aug 24, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1636.003
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 24, 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 <15.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.1

Published CVSS scores

2.1NISTAV:L/AC:L/Au:N/C:P/I:N/A:N
3.3NISTCVSS:3.1/AV:L/AC:L/PR:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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