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PatchSiren cyber security CVE debrief

CVE-2026-28983 Apple CVE debrief

A type confusion issue was addressed with improved checks in multiple Apple products. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. A remote attacker may be able to cause a denial of service. The vulnerability affects various Apple products, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. Organizations should review their deployments and apply patches to prevent potential exploitation.

Vendor
Apple
Product
iOS and iPadOS
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-11
Original CVE updated
2026-07-27
Advisory published
2026-05-11
Advisory updated
2026-07-27

Who should care

Organizations and individuals using Apple products, specifically iOS, iPadOS, macOS, tvOS, visionOS, and watchOS, should apply the provided patches to prevent potential denial-of-service attacks. This includes reviewing their deployments, applying patches, and monitoring for suspicious activity.

Technical summary

The CVE-2026-28983 vulnerability is a type confusion issue that was addressed with improved checks. It affects multiple Apple products, including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. The vulnerability can be exploited by a remote attacker to cause a denial of service. Apple has released patches for the affected products, which should be applied to prevent potential exploitation. The vulnerability has a CVSS score of 7.5 and a severity of HIGH.

Defensive priority

High

Recommended defensive actions

  • Apply patches for affected Apple products
  • Inventory and update vulnerable systems
  • Monitor for suspicious activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and affected products. Apple has released patches for the affected products, which should be applied to prevent potential exploitation. The vulnerability has a CVSS score of 7.5 and a severity of HIGH. The CVE record was published on 2026-05-11T21:18:58.423Z and has not been modified since then. The NVD entry is currently Modified.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-28983 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-28983

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

  • CVE-2026-28983 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-28983

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

Supplemental references

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.