SARA / Free Tools / CVE / CVE-2021-30807

CVE-2021-30807 — Apple Multiple Products Memory Corruption Vulnerability

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

CVSS
— —
EPSS
24.45% (top 4.00%)
CWE
—
Published
2021-10-19T13:12:40.000Z
Last modified
2025-10-21T23:25:28.262Z
CVSS vector
—
CISA KEV — Actively Exploited
Added to KEV
2021-11-03
BOD 22-01 due
2021-11-17
Ransomware use
Unknown
View KEV detail
CVE-2021-30807 on CISA KEV →

01What is this vulnerability?

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.

02Affected products

VendorProductVersions
ApplemacOSunspecified
ApplemacOSunspecified
ApplemacOSunspecified

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2021-11-03. Ransomware use: Unknown.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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