How severe is CVE-2025-43506?

CVE-2025-43506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-43506 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-43506?

CVE-2025-43506 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-43506?

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

Does CVE-2025-43506 have an EU (EUVD) identifier?

Yes. CVE-2025-43506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203139.

When was CVE-2025-43506 published?

CVE-2025-43506 was published on 2025-12-12 and last updated on 2026-06-17.

CVE-2025-43506

CVE-2025-43506 is a high-severity vulnerability in Apple Macos with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-843.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203139
Weakness: CWE-843
Affected product: Apple Macos
Published: 2025-12-12
Last modified: 2026-06-17

Description

A logic error was addressed with improved error handling. This issue is fixed in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one user is logged in at the same time.

Frequently asked questions

What is CVE-2025-43506?: A logic error was addressed with improved error handling. This issue is fixed in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one user is logged in at the same time.
How severe is CVE-2025-43506?: CVE-2025-43506 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-43506 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-43506?: CVE-2025-43506 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-43506?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-43506 have an EU (EUVD) identifier?: Yes. CVE-2025-43506 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203139.
When was CVE-2025-43506 published?: CVE-2025-43506 was published on 2025-12-12 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/125634

Affected products (1)

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

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