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CVE-2025-43539

8.8 · HIGH

The issue was addressed with improved bounds checks.

Published Dec 12, 2025CWE-787EPSS 6.16%

Overview

CVE-2025-43539 is a high-severity vulnerability. It was published on December 12, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing a file may lead to memory corruption.

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/125884Refsupport.apple.com/en-us/125885Refsupport.apple.com/en-us/125886Refsupport.apple.com/en-us/125887Refsupport.apple.com/en-us/125888Refsupport.apple.com/en-us/125889Refsupport.apple.com/en-us/125890Refsupport.apple.com/en-us/125891

How CyberStrike helps

Frequently asked questions

What is CVE-2025-43539?

CVE-2025-43539 is a high-severity vulnerability. It was published on December 12, 2025 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-43539?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-43539?

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-2025-43539?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-43539 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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