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MEDIUM · 4.6

CVE-2026-20834

Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.

Vulnerability Description

Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.

CVSS Score

4.6

MEDIUM

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Affected Products

VendorProductVersions
MicrosoftWindows 10 1607< 10.0.14393.8783
MicrosoftWindows 10 1809< 10.0.17763.8276
MicrosoftWindows 10 21H2< 10.0.19044.6809
MicrosoftWindows 10 22H2< 10.0.19045.6809
MicrosoftWindows 11 23H2< 10.0.22631.6491
MicrosoftWindows 11 24H2< 10.0.26100.7623
MicrosoftWindows 11 25H2< 10.0.26200.7623
MicrosoftWindows Server 2008-
MicrosoftWindows Server 2012-
MicrosoftWindows Server 2016< 10.0.14393.8783
MicrosoftWindows Server 2019< 10.0.17763.8276
MicrosoftWindows Server 2022< 10.0.20348.4648
MicrosoftWindows Server 2022 23H2< 10.0.25398.2092
MicrosoftWindows Server 2025< 10.0.26100.32230

Related Weaknesses (CWE)

CWE-359CWE-36

References

FAQ

What is CVE-2026-20834?

CVE-2026-20834 is a vulnerability with a CVSS score of 4.6 (MEDIUM). Absolute path traversal in Windows Shell allows an unauthorized attacker to perform spoofing with a physical attack.

How severe is CVE-2026-20834?

CVE-2026-20834 has been rated MEDIUM with a CVSS base score of 4.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-20834?

Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21H2, Microsoft Windows 10 22H2, Microsoft Windows 11 23H2.