Overview

The CVE-2025-43340 vulnerability is a significant security flaw found in macOS Tahoe 26, which could potentially allow an app to break out of its enforced sandbox. This vulnerability is particularly concerning, as it could result in system compromise or data leakage, posing serious risks to the confidentiality and integrity of the affected systems. It is of paramount importance for users and administrators of macOS Tahoe 26 to understand this vulnerability and take the necessary steps to mitigate its impact.

Vulnerability Summary

CVE ID: CVE-2025-43340
Severity: High (7.8 CVSS score)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

macOS | Tahoe 26

How the Exploit Works

The CVE-2025-43340 exploit takes advantage of a permissions issue in macOS Tahoe 26. The vulnerability allows an application to exceed its assigned permissions and escape from its sandbox. Essentially, a malicious app could perform actions outside of its restricted environment, potentially gaining unauthorized access to system resources or sensitive information. The exploit requires user interaction, meaning it is likely to be delivered through a malicious app that a user is tricked into installing or running.

Conceptual Example Code

This is a conceptual example of how the vulnerability might be exploited. This pseudocode represents a malicious app attempting a sandbox escape:

#include <stdio.h>
#include <stdlib.h>
int main() {
// Attempt to access a restricted system resource
FILE *file = fopen("/etc/passwd", "r");
if (file != NULL) {
printf("Successfully escaped sandbox and accessed system resource.\n");
} else {
printf("Failed to escape sandbox.\n");
}
return 0;
}

The above example represents an attempt to access a system file that should be restricted to the app. If the sandbox is not enforcing permissions correctly, this attempt will be successful, indicating a successful sandbox escape. The actual exploit would likely be more complex and tailored to specific targets or goals.