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PatchSiren cyber security CVE debrief

CVE-2021-30860 Apple CVE debrief

CVE-2021-30860 is an Apple multiple-products integer overflow vulnerability that CISA added to its Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03. CISA’s record indicates required action is to apply updates per vendor instructions, and the KEV due date was 2021-11-17. Because it appears in KEV, defenders should treat this as an urgent patching priority rather than a routine vulnerability-management item.

Vendor
Apple
Product
Multiple Products
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 and mobile management teams, security operations teams, and users responsible for maintaining Apple products covered by vendor updates should pay attention, especially where patch timing is tightly controlled.

Technical summary

The supplied sources identify the issue as an integer overflow vulnerability affecting Apple multiple products. CISA’s KEV listing confirms it is a known exploited vulnerability and directs organizations to apply updates per vendor instructions. No further technical detail, affected-product breakdown, or CVSS score is provided in the supplied corpus.

Defensive priority

Urgent: prioritize immediate remediation because CISA has listed this CVE in KEV and assigned a near-term due date.

Recommended defensive actions

  • Apply Apple updates per vendor instructions as soon as possible.
  • Verify asset inventory to identify Apple products that rely on the affected update stream.
  • Use change-management or maintenance windows to accelerate deployment while minimizing operational risk.
  • Confirm remediation status across endpoints after patching and track any exceptions.
  • Monitor official Apple and CISA guidance for any follow-up advisories or revised remediation notes.

Evidence notes

The debrief is based only on the supplied CVE metadata and official sources. The CISA KEV feed states the vulnerability name as "Apple Multiple Products Integer Overflow Vulnerability," dateAdded as 2021-11-03, dueDate as 2021-11-17, and requiredAction as "Apply updates per vendor instructions." The supplied source also references the NVD CVE detail page. No CVSS score, exploit chain details, or specific affected-product list were provided in the corpus.

Official resources

Published in the CVE record and CISA KEV feed on 2021-11-03; KEV due date listed as 2021-11-17. This debrief uses those source dates only and does not infer any separate disclosure or publication timing.