How severe is CVE-2021-30871?

CVE-2021-30871 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-30871 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30871?

CVE-2021-30871 primarily affects Apple Iphone Os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-30871?

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

When was CVE-2021-30871 published?

CVE-2021-30871 was published on 2021-08-24 and last updated on 2026-06-17.

CVE-2021-30871

CVE-2021-30871 is a medium-severity vulnerability in Apple Iphone Os with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Apple Iphone Os
Published: 2021-08-24
Last modified: 2026-06-17

Description

This issue was addressed with a new entitlement. This issue is fixed in iOS 14.7, watchOS 7.6, macOS Big Sur 11.5. A local attacker may be able to access analytics data.

Frequently asked questions

What is CVE-2021-30871?: This issue was addressed with a new entitlement. This issue is fixed in iOS 14.7, watchOS 7.6, macOS Big Sur 11.5. A local attacker may be able to access analytics data.
How severe is CVE-2021-30871?: CVE-2021-30871 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-30871 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30871?: CVE-2021-30871 primarily affects Apple Iphone Os. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30871?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-30871 published?: CVE-2021-30871 was published on 2021-08-24 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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