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CVE-2026-43815

8.8, high

Apple macOS Out-of-Bounds Write Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.8, high high CVSS v3.1
EPSS, next 30 days
0.5% higher than 39.9% of scored CVEs
Exploitation
No public evidence
Published
14 Sept 2026a month ago

Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Connecting to a malicious afpfs server may lead to kernel memory corruption.

Details

Vendor
Apple
Product
macOS
Weakness
CWE-787 (opens in a new tab)
Status
Modified
Updated
18 Sept 2026
Assigner
product-security@apple.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References 3

Advisories 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Apple CVEs

Every Apple CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-86950 Apple Multiple Products Out-of-Bounds Write Vulnerability KEV EPSS 1% 8.8, high
  • CVE-2026-65400 Apple macOS Improper Authentication Vulnerability KEV EPSS 2% 9.8, critical
  • CVE-2026-20700 Apple Multiple Buffer Overflow Vulnerability KEV EPSS 1% 7.8, high
  • CVE-2025-43529 Apple Multiple Products Use-After-Free WebKit Vulnerability KEV EPSS 9% 8.8, high
  • CVE-2025-43510 Apple Multiple Products Improper Locking Vulnerability KEV EPSS 0.4% 7.8, high
  • CVE-2025-43520 Apple Multiple Products Classic Buffer Overflow Vulnerability KEV EPSS 0.4% 5.5, medium
  • CVE-2023-43000 Apple Multiple products Use-After-Free Vulnerability KEV EPSS 4% 8.8, high
  • CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability KEV EPSS 32% 10, critical

Beyond this page

Is CVE-2026-43815 in your network?

This page tells you how dangerous CVE-2026-43815 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-43815 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.