CVE-2020-3882Network attack vector

Unauthenticated calendar invitation data exfiltration

Published Jun 9, 2020 · Updated Aug 4, 2024

An information disclosure issue in Apple macOS before 10.15.5 allows remote attackers to exfiltrate user information via a calendar invitation. Apple identifies maliciously crafted calendar invitation import as the triggering operation but has not publicly disclosed the specific implementation locus or failed check. Exploitation requires the invitation to be imported and user interaction, with confidentiality impact limited to exposed user information and no reported integrity or availability effect.

CVSS severity6.5
Medium
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An information disclosure issue in Apple macOS before 10.15.5 allows remote attackers to exfiltrate user information via a calendar invitation. Apple identifies maliciously crafted calendar invitation import as the triggering operation but has not publicly disclosed the specific implementation locus or failed check. Exploitation requires the invitation to be imported and user interaction, with confidentiality impact limited to exposed user information and no reported integrity or availability effect.

The record

CVE
CVE-2020-3882
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
macOS
Classifications
Unavailable
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 <macOS Catalina 10.15.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=unspecified <macOS Catalina 10.15.5

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
6.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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