How severe is CVE-2026-20699?

CVE-2026-20699 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-20699 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-20699?

CVE-2026-20699 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-20699?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-20699 have an EU (EUVD) identifier?

Yes. CVE-2026-20699 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15074.

When was CVE-2026-20699 published?

CVE-2026-20699 was published on 2026-03-25 and last updated on 2026-06-17.

CVE-2026-20699

CVE-2026-20699 is a medium-severity vulnerability in Apple Macos with a CVSS 3.x base score of 6.2. 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-347.

Key facts

Severity: Medium (CVSS 3.x base score 6.2)
EPSS exploit prediction: 0% (3rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-15074
Weakness: CWE-347
Affected product: Apple Macos
Published: 2026-03-25
Last modified: 2026-06-17

Description

A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, macOS Tahoe 26.4. An app may be able to access user-sensitive data.

Frequently asked questions

What is CVE-2026-20699?: A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, macOS Tahoe 26.4. An app may be able to access user-sensitive data.
How severe is CVE-2026-20699?: CVE-2026-20699 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-20699 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-20699?: CVE-2026-20699 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-20699?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-20699 have an EU (EUVD) identifier?: Yes. CVE-2026-20699 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-15074.
When was CVE-2026-20699 published?: CVE-2026-20699 was published on 2026-03-25 and last updated on 2026-06-17.

References

Affected products (1)

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

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