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CVE-2025-43300

10.0 · CRITICALActively Exploited

An out-of-bounds write issue was addressed with improved bounds checking.

Published Aug 21, 2025CWE-787EPSS 32.50%

Overview

CVE-2025-43300 is a critical-severity vulnerability. It was published on August 21, 2025 and has a CVSS 3.1 base score of 10.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsupport.apple.com/en-us/124925Refsupport.apple.com/en-us/124926Refsupport.apple.com/en-us/124927Refsupport.apple.com/en-us/124928Refsupport.apple.com/en-us/124929Refsupport.apple.com/en-us/125141Refsupport.apple.com/en-us/125142Refseclists.org/fulldisclosure/2025/Sep/10Refseclists.org/fulldisclosure/2025/Sep/14Refseclists.org/fulldisclosure/2025/Sep/52

How CyberStrike helps

Frequently asked questions

What is CVE-2025-43300?

CVE-2025-43300 is a critical-severity vulnerability. It was published on August 21, 2025 and has a CVSS 3.1 base score of 10.0 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2025-43300?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-43300?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-43300?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-43300 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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