Security readout for executives and security teams
Plain-English summary
CVE-2026-43814 is an Apple use-after-free memory error affecting iPhone, iPad, Mac, Apple TV, and Apple Watch software. Apple states that an app may trigger an unexpected system shutdown. Although rated critical at CVSS 9.8, the supplied description does not confirm data theft, privilege escalation, or code execution.
Executive priority
Treat this as an urgent patching priority because of the critical rating and broad Apple platform coverage. First establish the actual device population below version 26.6, then accelerate updates. Avoid assuming confirmed compromise or code execution: the supplied evidence documents system termination, while fuller security impact remains unclear.
Technical view
The issue is classified as CWE-416: use after free. Apple addressed it through improved memory management in iOS and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, and watchOS 26.6. The supplied CVSS vector indicates network reachability and potential confidentiality, integrity, and availability impact, but the narrative only documents app-triggered system termination.
Likely exposure
Potentially exposed assets are Apple devices running releases older than the listed 26.6 fixes. The source bundle does not provide reliable affected-version ranges, supported hardware details, or vulnerable-component information, so organizations should confirm applicability through Apple advisories and device inventory.
Exploitation context
The supplied sources do not establish active exploitation, and the CVE is not listed as KEV in the bundle. Publicly described impact is unexpected system termination caused by an app. Whether practical exploitation can achieve the broader impacts represented by the CVSS vector is not established here.
Researcher notes
The record contains an important evidence gap: CVSS 3.1 assigns AV:N/AC:L/PR:N/UI:N with complete confidentiality, integrity, and availability impact, while Apple's description identifies only app-triggered termination. Exact vulnerable components and affected version boundaries are absent. Testing should focus on defensive crash triage and version verification without assuming the vector proves exploitability.
Mitigation direction
- Update eligible Apple devices to the applicable 26.6 release or later.
- Prioritize managed devices exposed to untrusted applications or external content.
- Check Apple advisories for hardware eligibility and any additional vendor guidance.
- Apply normal application trust and installation controls until updates are complete.
Validation and detection
- Inventory iOS, iPadOS, macOS, tvOS, and watchOS versions across managed devices.
- Verify each device reports the applicable 26.6 release or later.
- Review Apple advisories to confirm product and hardware applicability.
- Monitor management platforms for failed, deferred, or unsupported updates.
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-2026-43814 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
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.