CVE-2026-58641

HIGH

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

CVSS v3.1 Score

7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Published: 8/11/2026Modified: 9/3/2026

Related Intelligence (2)

CRITICALZero Day

Patch Tuesday - August 2026

Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for on

CVE-2026-63520CVE-2026-55040
Rapid7
HIGHVulnerability

NVD HIGH: CVE-2026-58641 — Integer overflow or wraparound in .NET allows an unauthorized attacker to elevat...

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

CVE-2026-58641
NIST NVD

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58641Vendor Advisory