What is CVE-2026-58641?

CVE-2026-58641 is a high-severity vulnerability in Apple macOS, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-11.

How severe is CVE-2026-58641?

High severity. CVSS v3 base score is 7.8 out of 10.

Integer overflow in Apple macOS

CVE-2026-58641

Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally.

Vulnerability class: Integer Overflow

Published 2026-08-11 · last modified 2026-09-03.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.9th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

.NET Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-58641?: CVE-2026-58641 is a high-severity vulnerability in Apple macOS, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2026-08-11.
How severe is CVE-2026-58641?: High severity. CVSS v3 base score is 7.8 out of 10.