CVE-2021-30881

Code execution via FileProvider archive validation failure

Published Aug 24, 2021 · Updated Aug 3, 2024

Improper input validation in Apple FileProvider before iOS and iPadOS 15.1 and in affected macOS releases allows local users to execute code. FileProvider mishandles untrusted archive input during unpacking, but Apple has not published the precise validation failure or memory operation involved. Reaching the flaw requires a user to unpack a crafted archive; successful exploitation executes code in the affected process context.

CVSS severity7.8
High
EPSS probability1.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Apple FileProvider before iOS and iPadOS 15.1 and in affected macOS releases allows local users to execute code. FileProvider mishandles untrusted archive input during unpacking, but Apple has not published the precise validation failure or memory operation involved. Reaching the flaw requires a user to unpack a crafted archive; successful exploitation executes code in the affected process context.

The record

CVE
CVE-2021-30881
Published
Aug 24, 2021
Updated
Aug 3, 2024
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-20, T1204.002
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
Apple · macOSversion=unspecified <11.6; version=unspecified <12.0; version=unspecified <15.1; version=unspecified <2021; version=unspecified <8.1

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1204.002Malicious File

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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