CVE-2021-30999Network attack vector

Incomplete history deletion via faulty permissions logic

Published Aug 24, 2021 · Updated Aug 3, 2024

Incorrect permissions in Safari on iOS and iPadOS before 14.6 prevent local users from fully deleting browsing history. Safari's history-deletion path applies faulty permissions logic and fails to remove every browsing-history record; Apple has not disclosed the specific check. The affected user must invoke history deletion, and the bounded consequence is retention of records the user intended to erase.

CVSS severity4.3
Medium
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect permissions in Safari on iOS and iPadOS before 14.6 prevent local users from fully deleting browsing history. Safari's history-deletion path applies faulty permissions logic and fails to remove every browsing-history record; Apple has not disclosed the specific check. The affected user must invoke history deletion, and the bounded consequence is retention of records the user intended to erase.

The record

CVE
CVE-2021-30999
Published
Aug 24, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-276
Attack vector
network
Privileges
authenticated

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 <14.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <14.6

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:N/I:P/A:N
4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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