CVE-2024-27879Network attack vector

Application crash via insufficient UIKit bounds checks

Published Sep 16, 2024 · Updated Apr 2, 2026

Denial of service in UIKit in Apple iOS and iPadOS before 17.7 or before 18 allows attackers to terminate an application. UIKit performs an unspecified operation without adequate bounds checks, but Apple has not disclosed the affected function, input type, or precise trigger. The published assessment treats the flaw as remotely reachable without privileges or user interaction, and the reported consequence is limited to an application crash.

CVSS severity7.5
High
EPSS probability0.82%
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 UIKit in Apple iOS and iPadOS before 17.7 or before 18 allows attackers to terminate an application. UIKit performs an unspecified operation without adequate bounds checks, but Apple has not disclosed the affected function, input type, or precise trigger. The published assessment treats the flaw as remotely reachable without privileges or user interaction, and the reported consequence is limited to an application crash.

The record

CVE
CVE-2024-27879
Published
Sep 16, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS
Classifications
CWE-119, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record 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=0 <17.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=0 <17.7
Apple · iOS and iPadOSversion=0 <17.7; version=0 <18
Apple · iPadOSversion=0 <17.7

Published CVSS scores

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 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

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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