CVE-2020-9819
Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 3 May 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5, watchOS 5.3.7. Processing a maliciously crafted mail message may lead to heap corruption.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
- EPSS
- 2.23% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 November 2021 · due 3 May 2022
- Weakness
- CWE-787
- Affected
- apple/ipados · apple/iphone os · apple/watchos
- Source
- product-security@apple.com
EPSS 2.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2020-9819
References
- https://support.apple.com/HT211168Release Notes, Vendor Advisory
- https://support.apple.com/HT211169Release Notes, Vendor Advisory
- https://support.apple.com/HT211175Release Notes, Vendor Advisory
- https://support.apple.com/HT211176Release Notes, Vendor Advisory
- https://support.apple.com/HT211168Release Notes, Vendor Advisory
- https://support.apple.com/HT211169Release Notes, Vendor Advisory
- https://support.apple.com/HT211175Release Notes, Vendor Advisory
- https://support.apple.com/HT211176Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9819US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.