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CVE-2020-9819: Apple iOS, iPadOS, and watchOS Memory Corruption Vulnerability

criticalknown exploitedCVE-2020-9819
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Apple iOS, iPadOS, and watchOS Mail contains a memory corruption vulnerability that may allow heap corruption when processing a maliciously crafted mail message.

CSIRTS triage

vendor: Appleproduct: iOSMemory corruptionRemote code execution
What
There is a memory corruption vulnerability in the Mail application that may allow heap corruption when processing malicious emails.
Who is affected
Users of Apple iOS, iPadOS, and watchOS Mail are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Update to the latest version of iOS, iPadOS, or watchOS.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-9819

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-9819coverage & exploitation statusNVD · CVE.org

Recent advisories for Apple iOS

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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