CVE-2020-9818
Actively exploited. CVE-2020-9818 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Apple iOS, iPadOS, and watchOS Mail contains an out-of-bounds write vulnerability which may allow memory modification or application termination when processing a maliciously crafted mail message.
CSIRTS triage
- What
- An out-of-bounds write vulnerability may allow memory modification or application termination when processing a malicious mail message.
- Who is affected
- Users of Apple iOS, iPadOS, and watchOS Mail with the vulnerable version.
- Urgency
- Immediate action is necessary due to active exploitation and critical severity.
- Action
- Update to the latest version of iOS, iPadOS, and watchOS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 81% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2020-9818: Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerabilitycisa-kev · 2021-11-03
External references
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