Critical severity9.8NVD Advisory· Published Oct 27, 2020· Updated Jun 17, 2026

CVE-2020-9866

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. A buffer overflow may result in arbitrary code execution.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Apple Inc./Mac OS X
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
Range: <10.15.6
Apple Inc./macOS Mojavellm-fuzzy
Range: before Security Update 2020-004
Apple Inc./macOS Catalinallm-fuzzy
Range: before 10.15.6
Apple Inc./macOS High Sierrallm-fuzzy
Range: before Security Update 2020-004
Apple Inc./macOSv5
Range: unspecified

Patches

Vulnerability mechanics

References

support.apple.com/en-us/HT211289nvdRelease NotesVendor Advisory

News mentions

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