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Vulnerabilities

Vulnerability · CVE-2021-30807

Apple Multiple Products Memory Corruption Vulnerability

Published Jul 26, 2021 · catalog updated Jun 16, 2026 · Apple Multiple Products

Patch now

CVE-2021-30807 is in the CISA known-exploited catalog, due Nov 17, 2021. Confirm Apple Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
28.84%
Remediation
Remediation guidance
Affected products
cpe apple/ipados · cpe apple/iphone os · cpe apple/macos · cpe apple/watchos · vendor Apple Multiple Products

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apple/ipadosversion unspecified
  • cpe apple/iphone osversion unspecified
  • cpe apple/macosversion unspecified
  • cpe apple/watchosversion unspecified
  • vendor Apple Multiple Productsversion unspecified

How to fix CVE-2021-30807

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-30807 is in the CISA known-exploited catalog, due Nov 17, 2021. Confirm Apple Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 28.84%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 19, 2021 · Catalog

    Detected

    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.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Nov 17, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-30807

    Apple iOS, iPadOS, macOS, and watchOS IOMobileFrameBuffer contain a memory corruption vulnerability which may allow an application to execute code with kernel privileges.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-30807

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-30807

    30-day exploitation probability 28.8%

    first.org
  • NIST NVDVulnerability recordCVE-2021-30807

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-30807

    Apple iOS, iPadOS, macOS, and watchOS IOMobileFrameBuffer contain a memory corruption vulnerability which may allow an application to execute code with kernel privileges.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.