CVEs / CVE-2020-9819
CVE-2020-9819: Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- medium 4.3 CVSS 3.1 (NVD)
- EPSS 2.23% chance of exploitation in the next 30 days, higher than 82% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2020-9819
Summary
Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple iOS | from unspecified, before iOS 13.5 and iPadOS 13.5 | iOS 13.5 and iPadOS 13.5 |
| Apple iOS-1 | from unspecified, before iOS 12.4.7 | iOS 12.4.7 |
| Apple watchOS | from unspecified, before watchOS 6.2.5 | watchOS 6.2.5 |
| Apple watchOS-1 | from unspecified, before watchOS 5.3.7 | watchOS 5.3.7 |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 4.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:LScored by NVD |
|---|---|
| Weakness | CWE-787 |
References
- CVE-2020-9819 on NVD
- CVE-2020-9819 in the CISA KEV catalog
- https://support.apple.com/HT211168 Release Notes, Vendor Advisory
- https://support.apple.com/HT211169 Release Notes, Vendor Advisory
- https://support.apple.com/HT211175 Release Notes, Vendor Advisory
- https://support.apple.com/HT211176 Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9819 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.