CVE-2023-42962Network attack vector

Remote service interruption via undisclosed CallKit checks

Published Mar 28, 2024 · Updated Nov 4, 2025

Denial of service in CallKit in Apple iOS and iPadOS before 16.7.3 and 17.0 through 17.1.2 allows remote attackers to interrupt service. Apple states only that improved checks corrected the issue and has not disclosed the failed check, untrusted input, or affected CallKit operation. Network reachability is sufficient without authentication or user interaction, and the documented consequence is limited to service interruption.

CVSS severity7.5
High
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in CallKit in Apple iOS and iPadOS before 16.7.3 and 17.0 through 17.1.2 allows remote attackers to interrupt service. Apple states only that improved checks corrected the issue and has not disclosed the failed check, untrusted input, or affected CallKit operation. Network reachability is sufficient without authentication or user interaction, and the documented consequence is limited to service interruption.

The record

CVE
CVE-2023-42962
Published
Mar 28, 2024
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record 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 <16.7
  2. Affected versionversion=unspecified <17.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.7; version=unspecified <17.2

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5CISA-ADPCVSS: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

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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