Critical 9.8Published Oct 16, 2020

CVE-2020-9918An out-of-bounds read was addressed with improved input validation.

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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It affects apple mac_os_x and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Start free and add your stackFree account, 3 products Every CVE for apple mac_os_x Exploited in the last 30 days

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

CVSS: 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple mac_os_x apple:mac_os_x	before 10.15.6	NVD
apple tvos apple:tvos	before 13.4.8	NVD
apple watchos apple:watchos	before 6.2.8	NVD

References

References

https://support.apple.com/HT211288	release-notes, vendor-advisory
https://support.apple.com/HT211289	release-notes, vendor-advisory
https://support.apple.com/HT211290	release-notes, vendor-advisory
https://support.apple.com/HT211291	release-notes, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.