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PatchSiren cyber security CVE debrief

CVE-2021-30983 Apple CVE debrief

CVE-2021-30983 is an Apple iOS and iPadOS buffer overflow vulnerability that CISA added to the Known Exploited Vulnerabilities (KEV) catalog on 2022-06-27. Because it is in KEV, defenders should treat it as a priority patch item and apply vendor updates per Apple’s instructions.

Vendor
Apple
Product
iOS and iPadOS
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-06-27
Original CVE updated
2022-06-27
Advisory published
2022-06-27
Advisory updated
2022-06-27

Who should care

Organizations that manage Apple iOS and iPadOS devices, especially fleets with delayed patching, exposed mobile endpoints, or limited device management coverage.

Technical summary

The supplied sources identify CVE-2021-30983 as a buffer overflow affecting Apple iOS and iPadOS. CISA’s KEV entry confirms it is a known exploited vulnerability and directs defenders to apply updates per vendor instructions. No further technical detail is provided in the supplied corpus.

Defensive priority

Urgent. KEV-listed vulnerabilities should be remediated as quickly as operationally possible, with Apple devices prioritized for update and verification.

Recommended defensive actions

  • Apply Apple updates per vendor instructions as soon as possible.
  • Inventory affected iOS and iPadOS devices and identify any that are overdue for patching.
  • Prioritize internet-facing, high-value, and unmanaged devices for remediation and verification.
  • Confirm remediation across mobile device management (MDM) or other fleet controls.
  • Track the CVE in vulnerability management workflows until all affected devices are updated.

Evidence notes

CISA’s Known Exploited Vulnerabilities catalog lists CVE-2021-30983 as an Apple iOS and iPadOS buffer overflow vulnerability with required action to apply updates per vendor instructions. The supplied corpus also links the official CVE record and NVD detail page, but no additional technical specifics are included here. Dates in this debrief reflect the supplied CVE/KEV timeline, not publication or review time.

Sources and references

Verified primary and authoritative sources

  • CVE-2021-30983 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2021-30983

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

  • CVE-2021-30983 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2021-30983

    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.