PatchSiren

PatchSiren cyber security CVE debrief

CVE-2021-30869 Apple CVE debrief

CVE-2021-30869 is an Apple type confusion vulnerability affecting iOS, iPadOS, and macOS. CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03, which is a strong signal that defenders should treat it as an urgent remediation item. Apply vendor updates according to Apple’s guidance and prioritize exposed Apple devices first.

Vendor
Apple
Product
iOS, iPadOS, and macOS
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2021-11-03
Original CVE updated
2021-11-03
Advisory published
2021-11-03
Advisory updated
2021-11-03

Who should care

Apple device administrators, endpoint security teams, mobile device management operators, and users of iPhone, iPad, and Mac systems running affected software should pay attention. Organizations with large Apple fleets or internet-reachable managed devices should prioritize this CVE.

Technical summary

The available source corpus identifies the issue as a type confusion vulnerability in Apple iOS, iPadOS, and macOS. CISA’s KEV listing indicates the vulnerability is known to be exploited in the wild. No further technical details about the attack path or impact are provided in the supplied sources.

Defensive priority

High. KEV inclusion means defenders should treat this as an active risk and accelerate patching in line with vendor instructions, especially for managed or exposed Apple devices.

Recommended defensive actions

  • Apply Apple updates per vendor instructions as soon as possible.
  • Prioritize remediation for internet-facing, high-value, and unmanaged Apple devices.
  • Verify patch status across iOS, iPadOS, and macOS fleets through MDM or endpoint management tools.
  • Track this CVE against the CISA KEV due date of 2021-11-17 for remediation SLAs.
  • Monitor official Apple and CISA advisories for any additional guidance or related updates.

Evidence notes

This debrief is based only on the supplied CVE metadata and official links. The corpus states the vulnerability is a type confusion issue in Apple iOS, iPadOS, and macOS, and CISA lists it in KEV with dateAdded 2021-11-03 and dueDate 2021-11-17. No exploit details, affected version ranges, or remediation specifics beyond applying vendor updates were supplied.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-30869 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-30869

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

  • CVE-2021-30869 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-30869

    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.