Security readout for executives and security teams
Plain-English summary
Apple fixed a buffer overflow that a malicious accessory may trigger, causing an app to terminate unexpectedly. The listed Apple operating systems are potentially exposed until updated. Although the supplied CVSS rating is critical, the public description confirms app termination only; it does not confirm code execution or data theft.
Executive priority
Treat remediation as urgent because the vendor rates the issue critical and fixes span major Apple platforms. Prioritize high-value and accessory-exposed devices, while recognizing that supplied evidence confirms denial-of-service behavior rather than broader compromise.
Technical view
CVE-2026-43807 is a CWE-120 buffer overflow addressed through improved bounds checking. Fixes are listed for iOS/iPadOS, macOS, tvOS, visionOS, and watchOS. The CVSS 3.1 vector rates network attackability and full confidentiality, integrity, and availability impact, but the narrative describes a malicious accessory and unexpected app termination, creating an unresolved scope discrepancy.
Likely exposure
Potential exposure includes devices running affected Apple operating systems below the named fixed releases. The bundle does not provide usable starting versions or exact vulnerable ranges, so exposure cannot be determined from version inventory alone without consulting Apple’s advisories.
Exploitation context
No supplied source reports active exploitation, and the bundle marks the CVE as absent from KEV. A malicious accessory is the only stated trigger. Public evidence supplied here does not establish remote exploitation, code execution, data compromise, or an available proof of concept.
Researcher notes
The record lacks a named component, usable affected-version boundaries, and detailed accessory conditions. Its CVSS network vector and full CIA impact do not align cleanly with the accessory-triggered app-termination description. Validate technical scope against Apple’s individual advisories before drawing conclusions about exploitability or impact.
Mitigation direction
- Update supported Apple devices to the listed fixed versions or later vendor-approved releases.
- Prioritize devices permitted to connect with untrusted or unmanaged accessories.
- Restrict untrusted accessory use where immediate updating is not possible.
- Check each Apple advisory for model-specific availability and additional guidance.
Validation and detection
- Inventory iOS, iPadOS, macOS, tvOS, visionOS, and watchOS versions.
- Confirm iOS and iPadOS are at 18.7.10, 26.5.2, or applicable later releases.
- Confirm macOS is at Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.5.2, or later.
- Confirm tvOS, visionOS, and watchOS are at 26.6 or later.
- Verify update deployment through device-management reporting and investigate failed installations.
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-120: 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-2026-43807 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/127594CVE reference, apple
- https://support.apple.com/en-us/127595CVE 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.
Buffer Copy without Checking Size of Input
Buffer Copy without Checking Size of Input represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.