How severe is CVE-2023-40455?

CVE-2023-40455 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-40455 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40455?

CVE-2023-40455 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40455?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-40455 published?

CVE-2023-40455 was published on 2023-09-27 and last updated on 2026-06-17.

CVE-2023-40455

CVE-2023-40455 is a critical-severity vulnerability in Apple Macos with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Macos
Published: 2023-09-27
Last modified: 2026-06-17

Description

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sonoma 14. A sandboxed process may be able to circumvent sandbox restrictions.

Frequently asked questions

What is CVE-2023-40455?: A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sonoma 14. A sandboxed process may be able to circumvent sandbox restrictions.
How severe is CVE-2023-40455?: CVE-2023-40455 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-40455 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40455?: CVE-2023-40455 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40455?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-40455 published?: CVE-2023-40455 was published on 2023-09-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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