PT-2026-2702 · Microsoft · Windows

Shaowei Yan · Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20857

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 (affected versions not specified)

Description An issue exists in the Windows Cloud Files Mini Filter Driver where an untrusted pointer dereference can occur. This can allow a locally authorized attacker to gain elevated privileges. The issue allows attackers to affect the system.

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

Untrusted Pointer Dereference

Weakness Enumeration

CWE-822

Related Identifiers

BDU:2026-00435

CVE-2026-20857

Affected Products

Windows

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20857 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20857 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20857 · Security Note
• https://bdu.fstec.ru/vul/2026-00435 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20857 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20857 · Vendor Advisory
• https://twitter.com/CVEnew/status/2011759669111300317 · Twitter Post