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CVE-2021-1871

9.8 criticalKEVEPSS 7.0%

Critical (9.8) in Apple iOS, iPadOS, and macOS. In CISA KEV since 2021-11-03. EPSS 7.0% chance of exploitation in the next 30 days.

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
7.0% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)
CISA KEV
listed 2021-11-03, due 2021-11-17
Published
Modified
Record from
the NVD, synced

Affected

References

Check your stackJSON