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PatchSiren cyber security CVE debrief

CVE-2016-4657 Apple CVE debrief

CVE-2016-4657 is listed in CISA’s Known Exploited Vulnerabilities catalog as an Apple iOS WebKit memory corruption issue. In the supplied corpus, CISA added it on 2022-05-24 and set a remediation due date of 2022-06-14, so defenders should treat it as a patch-priority item. The corpus does not provide affected versions, exploitation mechanics, or Apple’s fix details, so validation should rely on the official vendor and NVD records.

Vendor
Apple
Product
iOS
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-05-24
Original CVE updated
2022-05-24
Advisory published
2022-05-24
Advisory updated
2022-05-24

Who should care

Apple iOS administrators, mobile device management teams, security operations, and organizations that allow iPhone or iPad access to sensitive systems.

Technical summary

The only confirmed technical detail in the supplied sources is that the vulnerability is a WebKit memory corruption issue in Apple iOS. CISA classifies it as a known exploited vulnerability and points to the NVD record. No affected-version range, attack vector, or remediation build numbers are included in the corpus, so additional confirmation should come from Apple’s security advisories and the official NVD entry.

Defensive priority

High

Recommended defensive actions

  • Inventory Apple iOS devices, including supervised and BYOD endpoints where possible.
  • Apply Apple vendor updates as soon as practical, following normal change-control procedures.
  • Verify patch status through MDM or endpoint compliance reporting.
  • Prioritize high-risk devices, especially those used for privileged access or sensitive data.
  • Monitor Apple security guidance and the NVD entry for updated remediation information.

Evidence notes

CISA’s KEV catalog entry identifies Apple iOS / WebKit memory corruption as a known exploited vulnerability, with dateAdded 2022-05-24 and dueDate 2022-06-14. The source-item metadata explicitly says, 'Apply updates per vendor instructions.' The supplied corpus also links the official CVE record and NVD entry, but it does not include affected versions or deeper technical specifics.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-4657 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-4657

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-4657 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-4657

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.