ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2016-4656

Apple iOS Memory Corruption Vulnerability

Published Aug 15, 2016 · catalog updated Jun 16, 2026 · Apple iOS

Patch now

CVE-2016-4656 is in the CISA known-exploited catalog, due Jun 14, 2022. Confirm Apple iOS 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
23.63%
Remediation
Remediation guidance
Affected products
cpe apple/iphone os · vendor Apple iOS

A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.

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/iphone osversion unspecified
  • vendor Apple iOSversion unspecified

How to fix CVE-2016-4656

What to do

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

Should you patch?

CVE-2016-4656 is in the CISA known-exploited catalog, due Jun 14, 2022. Confirm Apple iOS 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-264; CWE-787: Out-of-bounds Write. EPSS 23.63%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. 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. Aug 25, 2016 · Catalog

    Detected

    A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.

  2. May 24, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Jun 14, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.

Sources

  • CISA KEVConfirmed exploitationCVE-2016-4656

    A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2016-4656

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2016-4656

    30-day exploitation probability 23.6%

    first.org
  • Exploit DatabasePublic exploit reference44836

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • Metasploit ModulesPublic exploit moduleexploit_apple_ios/browser/webkit_trident

    Public module reference (manual). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2016-4656

    The kernel in Apple iOS before 9.3.5 allows attackers to execute arbitrary code in a privileged context or cause a denial of service (memory corruption) via a crafted app.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2016-4656

    A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.

    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.