PT-2026-2684 · Microsoft · Windows Shell+1

Nacl · Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20834

Positive Technologies (AI Summary)

CVSS v2.0

4.9

Medium

Base vector

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

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

Description A security issue exists in Windows Shell that allows an unauthorized attacker to perform spoofing. This requires physical access to the system. The issue involves an absolute path traversal, enabling attackers to affect the system.

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

Weakness Enumeration

CWE-36

CWE-359

Related Identifiers

BDU:2026-00534

CVE-2026-20834

Affected Products

Windows

Windows Shell

References · 8

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20834 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20834 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20834 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-20834 · Security Note
• https://bdu.fstec.ru/vul/2026-00534 · Security Note
• https://osv.dev/vulnerability/CVE-2026-20834 · Vendor Advisory
• https://twitter.com/vuldb/status/2011433262531657917 · Twitter Post
• https://twitter.com/CVEnew/status/2011759680876363866 · Twitter Post