Security readout for executives and security teams
Plain-English summary
This Apple use-after-free flaw can let an app trigger an unexpected system shutdown or crash. Apple fixed it across supported iPhone, iPad, Mac, Apple TV, Vision Pro, and Apple Watch software. Although rated critical with CVSS 9.8, the supplied public description confirms system termination only; it does not claim code execution or data theft.
Executive priority
Treat remediation as urgent because the supplied severity is critical and the flaw spans several Apple platforms. Accelerate patching on high-value and widely deployed devices, while recognizing that public evidence currently confirms an availability impact rather than compromise. Request prompt reporting of update coverage and exceptions.
Technical view
CVE-2026-43799 is a CWE-416 use-after-free vulnerability addressed through improved memory management. The record assigns CVSS 3.1 score 9.8 with network reachability and high confidentiality, integrity, and availability impacts. However, Apple’s disclosed impact is limited to an app causing unexpected system termination, and the affected component and precise vulnerable version ranges are not provided.
Likely exposure
Potential exposure includes Apple devices running releases earlier than iOS/iPadOS 18.7.10 or 26.6, macOS Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.6, or version 26.6 of tvOS, visionOS, and watchOS. The bundle does not provide reliable lower bounds, so exact affected ranges cannot be established from these sources.
Exploitation context
The supplied record does not identify CVE-2026-43799 as a CISA KEV entry, and no cited source reports active exploitation or a public proof of concept. This does not prove exploitation is absent. Public technical detail is too limited to determine whether the flaw can produce effects beyond the documented unexpected system termination.
Researcher notes
Disclosure is sparse: no affected subsystem, triggering conditions, vulnerable lower bounds, crash signature, or exploitation indicators are supplied. The CVSS vector suggests remote, unauthenticated impact, while Apple describes an app causing termination; this apparent tension cannot be resolved from the bundle. Avoid assuming code execution, sandbox escape, or cross-device attackability without additional vendor evidence.
Mitigation direction
- Update affected Apple devices to the listed fixed release or a later vendor-supported version.
- Prioritize internet-facing, privileged, shared, and business-critical Apple devices.
- Use device-management tooling to enforce updates and identify systems that cannot receive them.
- Check Apple security guidance for any revised affected-version information or additional mitigations.
Validation and detection
- Inventory iOS, iPadOS, macOS, tvOS, visionOS, and watchOS versions across managed assets.
- Confirm every device meets or exceeds the applicable fixed release listed by Apple.
- Verify updates completed successfully and devices restarted where required.
- Review crash telemetry for unexplained system terminations, noting that no specific indicator is published.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-43799 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/128066CVE reference, apple
- https://support.apple.com/en-us/128067CVE reference, apple
- https://support.apple.com/en-us/128068CVE reference, apple
- https://support.apple.com/en-us/128069CVE reference, apple
- https://support.apple.com/en-us/128070CVE reference, apple
- https://support.apple.com/en-us/128071CVE reference, apple
- https://support.apple.com/en-us/128072CVE reference, apple
- https://support.apple.com/en-us/148287CVE reference, apple
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.