# CVE-2025-43520

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

- Page: https://www.vulneraibility.com/cve/CVE-2025-43520
- CVSS: 5.5
- Known exploited: yes, in CISA KEV since 2026-03-20; CISA due date 2026-04-03
- EPSS: 0.43%
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2026-10-30)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2026-03-21)
- Weakness: CWE-120
- Published: 2025-12-12

## Affected versions

- Apple iOS and iPadOS: affected < 18.7.2; < 26.1
- Apple macOS: affected < 14.8.2; < 15.7.2; < 26.1
- Apple tvOS: affected < 26.1
- Apple visionOS: affected < 26.1
- Apple watchOS: affected < 26.1

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://support.apple.com/en-us/125632
- [other] https://support.apple.com/en-us/125633
- [other] https://support.apple.com/en-us/125634
- [other] https://support.apple.com/en-us/125635
- [other] https://support.apple.com/en-us/125636
- [other] https://support.apple.com/en-us/125637
- [other] https://support.apple.com/en-us/125638
- [other] https://support.apple.com/en-us/125639
- [advisory] https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.