CVE-2020-3837: in the CISA KEV catalogue
Apple Multiple Products Memory Corruption Vulnerability. CISA added CVE-2020-3837 to the Known Exploited Vulnerabilities catalogue on 2022-06-27 with a default due date of 2022-07-18. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Apple iOS, iPadOS, macOS, tvOS, and watchOS contain a memory corruption vulnerability that could allow an application to execute code with kernel privileges. (CISA description)
- Vendor / product
- Apple Multiple Products
- CWE
- CWE-787
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 15%, percentile 96 (scored 2026-11-03)
EPSS puts about 15 in 100 odds (15%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 96% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
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-2020-3837 in the CISA KEV catalogue?
Yes. CISA added CVE-2020-3837 (Apple Multiple Products Memory Corruption Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-06-27. CISA's default due date for it is 2022-07-18.
Is CVE-2020-3837 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2020-3837. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2020-3837?
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-2020-3837