CVE-2026-86981CWE-787

CVE-2026-86981

Medium · published October 20, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
0.7
In the wild
Unconfirmed
What it is

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00098 · 0.7th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-20T05:17Z
References (2)
https://support.apple.com/en-us/149042 · [email protected]https://support.apple.com/en-us/149043 · [email protected]
EPSS history
Timeline
  • 21 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 20 OCT 00:50Z
    An out-of-bounds write issue was addressed with improved bounds checking
    cvelistv5
  • 20 OCT 00:50Z
    An out-of-bounds write issue was addressed with improved bounds checking
    cvelistv5