CVE-2026-43656: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple iOS and iPadOS
CVE-2026-43656 is a high-severity vulnerability in Apple iOS and iPadOS where parsing a maliciously crafted file may cause an unexpected app termination due to an out-of-bounds write issue. Apple addressed this vulnerability with improved input validation in iOS 18.7.9, iPadOS 18.7.9, and corresponding macOS versions. The vulnerability has a CVSS score of 7.3, indicating significant impact on confidentiality, integrity, and availability. No known exploits are reported in the wild. Patch status is not explicitly confirmed in the provided data, so users should verify with official Apple advisories for remediation guidance.
AI Analysis
Technical Summary
This vulnerability involves an out-of-bounds write (CWE-787) triggered by parsing a maliciously crafted file on Apple iOS and iPadOS devices. The issue can lead to unexpected application termination, potentially impacting system stability and availability. Apple has fixed the issue by improving input validation in iOS 18.7.9, iPadOS 18.7.9, and related macOS releases. The CVSS 3.1 base score is 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and partial impact on confidentiality, integrity, and availability. No vendor advisory or patch links are provided in the input, so patch availability is not explicitly confirmed here.
Potential Impact
Successful exploitation may cause unexpected termination of applications processing maliciously crafted files, leading to denial of service and partial loss of confidentiality and integrity. The vulnerability affects Apple iOS and iPadOS platforms and could disrupt normal app operations. There are no known exploits in the wild at this time.
Mitigation Recommendations
Apple has released fixes in iOS 18.7.9, iPadOS 18.7.9, and corresponding macOS versions that address this vulnerability through improved input validation. Users and administrators should apply these updates promptly once confirmed available. Patch status is not explicitly confirmed in the provided data; therefore, verify the current remediation status with official Apple security advisories before taking action.
CVE-2026-43656: Parsing a maliciously crafted file may lead to an unexpected app termination in Apple iOS and iPadOS
Description
CVE-2026-43656 is a high-severity vulnerability in Apple iOS and iPadOS where parsing a maliciously crafted file may cause an unexpected app termination due to an out-of-bounds write issue. Apple addressed this vulnerability with improved input validation in iOS 18.7.9, iPadOS 18.7.9, and corresponding macOS versions. The vulnerability has a CVSS score of 7.3, indicating significant impact on confidentiality, integrity, and availability. No known exploits are reported in the wild. Patch status is not explicitly confirmed in the provided data, so users should verify with official Apple advisories for remediation guidance.
CVSS v3.1
Score 7.3high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an out-of-bounds write (CWE-787) triggered by parsing a maliciously crafted file on Apple iOS and iPadOS devices. The issue can lead to unexpected application termination, potentially impacting system stability and availability. Apple has fixed the issue by improving input validation in iOS 18.7.9, iPadOS 18.7.9, and related macOS releases. The CVSS 3.1 base score is 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and partial impact on confidentiality, integrity, and availability. No vendor advisory or patch links are provided in the input, so patch availability is not explicitly confirmed here.
Potential Impact
Successful exploitation may cause unexpected termination of applications processing maliciously crafted files, leading to denial of service and partial loss of confidentiality and integrity. The vulnerability affects Apple iOS and iPadOS platforms and could disrupt normal app operations. There are no known exploits in the wild at this time.
Mitigation Recommendations
Apple has released fixes in iOS 18.7.9, iPadOS 18.7.9, and corresponding macOS versions that address this vulnerability through improved input validation. Users and administrators should apply these updates promptly once confirmed available. Patch status is not explicitly confirmed in the provided data; therefore, verify the current remediation status with official Apple security advisories before taking action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-05-01T22:46:21.639Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a028769cbff5d86108b6dfa
Added to database: 05/12/2026, 01:50:33 UTC
Last enriched: 05/19/2026, 10:53:48 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 79
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