CVE-2021-30807
Apple Multiple Products Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 28.84% probability · 98th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021
- Weakness
- CWE-787
- Affected
- apple/ipados · apple/iphone os · apple/macos · apple/watchos
- Source
- product-security@apple.com
EPSS 28.8% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. 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-2021-30807
References
- https://support.apple.com/en-us/HT212622Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212623Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212713Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212622Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212623Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212713Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30807Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.