CVE-2020-9826Network attack vector

Remote service interruption via malformed AirDrop input

Published Jun 9, 2020 · Updated Aug 4, 2024

Improper input validation in AirDrop in Apple iOS before 13.5 and macOS Catalina before 10.15.5 allows remote attackers to interrupt service. Apple has not disclosed the input type, parsing locus, or validation error that permits malformed AirDrop traffic to trigger the denial of service. No authentication or user interaction is required, but the public record does not identify whether the result is an AirDrop process hang, crash, or broader system interruption.

CVSS severity7.5
High
EPSS probability1.19%
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 AirDrop in Apple iOS before 13.5 and macOS Catalina before 10.15.5 allows remote attackers to interrupt service. Apple has not disclosed the input type, parsing locus, or validation error that permits malformed AirDrop traffic to trigger the denial of service. No authentication or user interaction is required, but the public record does not identify whether the result is an AirDrop process hang, crash, or broader system interruption.

The record

CVE
CVE-2020-9826
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
iOS
Classifications
CWE-20, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 <iOS 13.5 and iPadOS 13.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=unspecified <iOS 13.5 and iPadOS 13.5
Apple · macOSversion=unspecified <macOS Catalina 10.15.5

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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