CVE-2023-40448Network attack vector

Unauthenticated sandbox escape via protocol mishandling

Published Sep 26, 2023 · Updated Nov 4, 2025

Sandbox escape in Apple iOS, iPadOS, tvOS, watchOS, and macOS allows remote attackers to leave the Web Content sandbox via network requests. The App Store component mishandles unspecified protocols; Apple has not disclosed the affected protocol, parser, or erroneous operation. No credentials or user interaction are required, and successful exploitation crosses only the Web Content sandbox boundary; further impact is not reported.

CVSS severity8.6
High
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Apple iOS, iPadOS, tvOS, watchOS, and macOS allows remote attackers to leave the Web Content sandbox via network requests. The App Store component mishandles unspecified protocols; Apple has not disclosed the affected protocol, parser, or erroneous operation. No credentials or user interaction are required, and successful exploitation crosses only the Web Content sandbox boundary; further impact is not reported.

The record

CVE
CVE-2023-40448
Published
Sep 26, 2023
Updated
Nov 4, 2025
Vendor
Apple
Product
iOS and iPadOS
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 26, 2023CVE 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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <16.7; version=unspecified <17
Apple · tvOSversion=unspecified <17
Apple · macOSversion=unspecified <14
Apple · watchOSversion=unspecified <10

Published CVSS scores

8.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/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 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

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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