CVE-2021-47864CWE-428

OSAS Traverse Extension 11 - 'travextensionhostsvc' Unquoted Service Path

High · published January 21, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
3.9
In the wild
Unconfirmed
What it is

⚡ An unquoted service path is your ticket to a risky game! With this vulnerability in OSAS Traverse Extension 11, attackers can easily manipulate the system like a magician pulling a rabbit out of a hat! 🎩✨ Think of this vulnerability as a letter addressed to 'Resident' without a specific name. If someone slips a malicious letter in there, anyone (even a system with high privileges) could accidentally open it! An attacker could place a crafted executable in the unquoted service path, leading to remote code execution with LocalSystem privileges. This means they could potentially gain full control of the system, modify or delete important files, and even install malicious software without a hitch! Absolutely devastating!

Put simply

Think of this vulnerability as a letter addressed to 'Resident' without a specific name. If someone slips a malicious letter in there, anyone (even a system with high privileges) could accidentally open it! This vulnerability stems from the TravExtensionHostSvc service not enclosing its executable path in quotes, allowing for path traversal attacks. By injecting malicious files into the service's path, attackers can execute code with elevated permissions.

What to do

An attacker could place a crafted executable in the unquoted service path, leading to remote code execution with LocalSystem privileges. This means they could potentially gain full control of the system, modify or delete important files, and even install malicious software without a hitch! Absolutely devastating! To protect your systems, immediately configure the service to use a quoted path for its executable. Additionally, ensure that you review any files in the service's path and remove any unauthorized executables. Finally, keep your software updated to the latest version! You've got this! Follow these steps to secure your system, and you'll be a security hero in no time! 🛡️

The record
Technical detail
CVSS v4.0
8.5 · HIGH
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
EPSS
0.00151 · 3.9th percentile
Weakness
CWE-428 · Unquoted Search Path or Element
Published
2026-01-21T17:27Z
EPSS history
Timeline
  • 21 JAN 17:27Z
    OSAS Traverse Extension 11 - 'travextensionhostsvc' Unquoted Service Path
    cvelistv5