CVE-2021-30906

Local privilege escalation via undisclosed flaw

Published Aug 24, 2021 · Updated Aug 3, 2024

Privilege escalation in Apple iOS and iPadOS before 15.1 allows local attackers to elevate privileges via an undisclosed flaw. Apple also lists macOS releases before Big Sur 11.6.1 and Monterey 12.0.1 as affected. The vendor describes improved checks but has not published the vulnerable component or operation, so impact requires local code execution and is limited to privilege elevation.

CVSS severity7.8
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Apple iOS and iPadOS before 15.1 allows local attackers to elevate privileges via an undisclosed flaw. Apple also lists macOS releases before Big Sur 11.6.1 and Monterey 12.0.1 as affected. The vendor describes improved checks but has not published the vulnerable component or operation, so impact requires local code execution and is limited to privilege elevation.

The record

CVE
CVE-2021-30906
Published
Aug 24, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-269, T1068
Attack vector
local
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 <15.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <15.1
Apple · macOSversion=unspecified <11.6; version=unspecified <12.0; version=unspecified <15.1; version=unspecified <8.1

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.6NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1068Exploitation for Privilege Escalation

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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