CVE-2020-9859: in the CISA KEV catalogue
Apple Multiple Products Code Execution Vulnerability. CISA added CVE-2020-9859 to the Known Exploited Vulnerabilities catalogue on 2021-11-03 with a default due date of 2022-05-03. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Apple iOS, iPadOS, macOS, watchOS, and tvOS contain an unspecified vulnerability that may allow an application to execute code with kernel privileges. (CISA description)
- Vendor / product
- Apple Multiple Products
- CWE
- CWE-415
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 0.83%, percentile 57 (scored 2026-11-04)
EPSS puts about 8.3 in 1,000 odds (0.83%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 57% of scored CVEs. Most CVEs score under 1%, so a high percentile can sit on a small probability: read the percentage first.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2020-9859 in the CISA KEV catalogue?
Yes. CISA added CVE-2020-9859 (Apple Multiple Products Code Execution Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2021-11-03. CISA's default due date for it is 2022-05-03.
Is CVE-2020-9859 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2020-9859. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2020-9859?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2020-9859