CVE-2021-47780CWE-428

Macro Expert 4.7 - Unquoted Service Path

High · published January 15, 2026

CVSS v4.0
8.5
EPSS
0%
Percentile
15.1
In the wild
Unconfirmed
What it is

⚡ A local user can execute arbitrary code with SYSTEM privileges through a misconfigured service path! Talk about a backdoor invitation! 🔥 Think of it like a restaurant where the chef leaves the kitchen door wide open. If someone sneaks in and leaves a rogue ingredient on the counter, the next dish served could be a nasty surprise for diners—except in this case, the kitchen is your computer! An attacker could inject a harmful executable that runs with full administrative rights when the service starts. This means they could manipulate system files, install malware, or even take total control of the machine. The consequences could be absolutely devastating!

Put simply

Think of it like a restaurant where the chef leaves the kitchen door wide open. If someone sneaks in and leaves a rogue ingredient on the counter, the next dish served could be a nasty surprise for diners—except in this case, the kitchen is your computer! This vulnerability arises because the service path for Macro Expert 4.7 is unquoted, allowing attackers to exploit it by placing malicious executables in a location that the service might execute without proper checks.

What to do

An attacker could inject a harmful executable that runs with full administrative rights when the service starts. This means they could manipulate system files, install malware, or even take total control of the machine. The consequences could be absolutely devastating! To mitigate this risk, ensure the service path is correctly quoted to prevent exploitation. Patch to the latest version of Macro Expert, and audit your service configurations to secure all paths. Don't leave any doors open! You’ve got this! Following these steps will help fortify your defenses! 🛡️

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
0.00247 · 15.1th percentile
Weakness
CWE-428 · Unquoted Search Path or Element
Published
2026-01-15T23:25Z
EPSS history
Timeline
  • 15 JAN 23:25Z
    Macro Expert 4.7 - Unquoted Service Path
    cvelistv5