PT-2026-58645 · Microsoft · Windows Kernel+1

CVE-2026-58532 · Published 2026-07-14 · Updated 2026-07-17

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Windows Kernel (affected versions not specified)

Description An integer overflow or wraparound occurs in the tcpip.sys driver, which allows an authorized attacker to elevate privileges locally and affect the system. An integer overflow is a condition where an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented with a given number of digits.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

BDU:2026-10074

CVE-2026-58532

Affected Products

Windows

Windows Kernel

References · 8

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-58532 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-10074 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-58532 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58532 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-58532 · Security Note
• https://twitter.com/april_ivyyy/status/2078105848887300522 · Twitter Post
• https://core-jmp.org/2026/07/cve-2026-58532-tcpip-sys-integer-overflow · Note
• https://twitter.com/april_ivyyy/status/2077909074096570734 · Twitter Post