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CVE-2025-43504

MediumPublished

A buffer overflow was addressed with improved bounds checking. This issue is fixed in Xcode 26.1. A user in a privileged network position may be able to...

Published: Nov 4, 2025
Updated: Apr 2, 2026
Assigning CNA: apple
Evidence observed: Aug 6, 2026

Primary CVSS

4.9/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 28.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A buffer overflow was addressed with improved bounds checking. This issue is fixed in Xcode 26.1. A user in a privileged network position may be able to cause a denial-of-service.

Sources

CVE-2025-43504PoC
Technical deep-dive into CVE-2025-43504, a remote pre-authentication global buffer overflow in LLDB's debugserver for iOS, with PoC code and exploitation analysis.

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