CVE-2026-86950KEV · OVERDUECWE-787

Apple Multiple Products Out-of-Bounds Write Vulnerability

High · published September 29, 2026

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 69.0th percentile for exploit probability.

11
days past CISA
deadline
CVSS v3.1
8.8
EPSS
1%
Percentile
69.0
In the wild
Confirmed
What it is

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01242 · 69.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-09-29T00:17Z
KEV added
2026-09-29 · due 2026-10-13
Affected products (4)
ProductVersionsFixed in
apple/ipados< 26.7.126.7.1
apple/iphone_os< 26.7.126.7.1
apple/macos< 15.8.115.8.1
apple/macos≥ 26.0, < 26.7.126.7.1
References (7)
https://support.apple.com/en-us/149226 · [email protected]https://support.apple.com/en-us/149228 · [email protected]https://support.apple.com/en-us/149229 · [email protected]http://seclists.org/fulldisclosure/2026/Sep/89 · af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2026/Sep/90 · af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2026/Sep/91 · af854a3a-2127-422b-91ae-364da2661108https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86950 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 30 SEP 03:29Z
    EPSS moved — → 1%
    epss
  • 28 SEP 19:13Z
    An out-of-bounds write issue was addressed with improved bounds checking
    cvelistv5