Apple iOS, iPadOS, and watchOS
YES - ON THE CISA KEV LIST
CVE-2020-9819
Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability
overdue since 2022-05-03
Apple: 96 entries (5.4% of all KEV entries are from this vendor); 10 added in 2026.
BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.
Your BOD 26-04 window (SSVC tier helper)
Your remediation window ends:
Description
Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.
Required action (CISA)
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2020-9819
References
Other KEV entries for this vendor: Apple
- CVE-2024-27834 - Multiple Products (2026-11-04)
- CVE-2026-86950 - Multiple Products (2026-09-29)
- CVE-2026-65400 - macOS (2026-08-18)
- CVE-2025-43510 - Multiple Products (2026-03-20)
- CVE-2025-43520 - Multiple Products (2026-03-20)
- CVE-2025-31277 - Multiple Products (2026-03-20)
- CVE-2023-43000 - Multiple Products (2026-03-05)
- CVE-2021-30952 - Multiple Products (2026-03-05)
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