CVE-2020-9776

Call-history disclosure via absent entitlement requirement

Published Apr 1, 2020 · Updated Aug 4, 2024

Information disclosure in Call History in Apple macOS Catalina 10.15.3 allows local users to read a user's call history via a malicious application. The Call History access path fails to require a dedicated entitlement before returning protected records to the requesting application. Exploitation requires user interaction to run the malicious application, and the disclosed consequence is limited to reading call-history data.

CVSS severity3.3
Low
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Call History in Apple macOS Catalina 10.15.3 allows local users to read a user's call history via a malicious application. The Call History access path fails to require a dedicated entitlement before returning protected records to the requesting application. Exploitation requires user interaction to run the malicious application, and the disclosed consequence is limited to reading call-history data.

The record

CVE
CVE-2020-9776
Published
Apr 1, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
macOS
Classifications
T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 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 10.15.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · macOSversion=unspecified <macOS Catalina 10.15.4

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

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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