CVE-2021-47864 HIGH

CVE-2021-47864: OSAS Traverse Extension 11 - 'travextensionhostsvc' Unquoted Service Path

Vendor Osas
Product OSAS Traverse Extension
Weakness CWE-428
Published January 21, 2026
Last update April 7, 2026

CVSS base score

8.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

OSAS Traverse Extension 11 contains an unquoted service path vulnerability in the TravExtensionHostSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to inject and execute malicious code by placing executable files in the service's path, potentially gaining elevated system access.

Key dates

02Disclosure timeline

January 21, 2026 CVE published
April 7, 2026 Record updated