PT-2026-48018 · Microsoft · Windows

CVE-2026-45657 · Published 2026-06-09 · Updated 2026-07-16

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

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

Description A use after free issue in the Windows Kernel allows an unauthorized attacker to execute code remotely over a network. This flaw enables remote, unauthenticated code execution at SYSTEM level without requiring user interaction. Use after free is a condition where a program continues to use a pointer after it has been freed, which can lead to memory corruption.

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

DoS

RCE

Heap Based Buffer Overflow

Use After Free

Weakness Enumeration

CWE-122

CWE-416

Related Identifiers

BDU:2026-08113

CVE-2026-45657

Affected Products

Windows

References · 34

• https://nvd.nist.gov/vuln/detail/CVE-2026-45657 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45657 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-45657 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-08113 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-45657 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/733491 · Security Note
• https://twitter.com/uwillc/status/2067538785378676903 · Twitter Post
• https://t.me/cveNotify/166936 · Telegram Post
• https://t.me/CSIRT_italia/3714 · Telegram Post
• https://twitter.com/Erwin_Mike_S/status/2064733374321692692 · Twitter Post
• https://twitter.com/vuldb/status/2064695133803864297 · Twitter Post
• https://twitter.com/RubberDuckCz/status/2077742096253899025 · Twitter Post
• https://twitter.com/vuln_tracker/status/2064608374399111343 · Twitter Post
• https://twitter.com/Nu11Sector/status/2066679981753651493 · Twitter Post
• https://twitter.com/ThreatSignal_IN/status/2066492057393463598 · Twitter Post