CVE-2020-9859A memory consumption issue was addressed with improved memory handling.
Updated under an hour ago ()
Does this affect you?
It affects Apple iOS and 6 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Nov 3, 2021; federal agencies had to remediate by May 3, 2022. Treat that date as your deadline.
Do this next
Free account, 1 product
A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5.1 and iPadOS 13.5.1, macOS Catalina 10.15.5 Supplemental Update, tvOS 13.4.6, watchOS 6.2.6. An application may be able to execute arbitrary code with kernel privileges.
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-415
- Known exploited
- Added to CISA KEV Nov 3, 2021; federal remediation due May 3, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 0.83% (percentile 57)
- Assigned by
- apple
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apple iOS apple:ios (from the name) | from unspecified before iOS 13.5.1 and iPadOS 13.5.1 | CNA record |
Apple macOS apple:macos (from the name) | from unspecified before macOS Catalina 10.15.5 Supplemental Update | CNA record |
Apple tvOS apple:tvos (from the name) | from unspecified before tvOS 13.4.6 | CNA record |
Apple watchOS apple:watchos (from the name) | from unspecified before watchOS 6.2.6 | CNA record |
apple ipados apple:ipados | before 13.5.1 | NVD |
apple iphone_os apple:iphone_os | before 13.5.1 | NVD |
apple mac_os_x apple:mac_os_x | before 10.15.5 | NVD |
apple tvos apple:tvos | before 13.4.6 | NVD |
apple watchos apple:watchos | before 6.2.6 | NVD |
References
- https://support.apple.com/HT211214x-refsource-misc, release-notes, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9859us-government-resource
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.