CVE-2021-47891CWE-306

Unified Remote 3.9.0.2463 - Remote Code Execution

Critical · published January 23, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
60.8
In the wild
Unconfirmed
What it is

🚨 Just a single crafted packet can open up your system to remote code execution! This vulnerability in Unified Remote 3.9.0.2463 lets attackers command your device like a maestro conducting an orchestra. 🔥 Think of it as a delivery driver who can not only drop off packages but also step inside and do whatever they want in your house if they receive the right, albeit forged, delivery instructions. That could lead to chaos! An attacker could execute arbitrary commands, potentially accessing sensitive data, installing malware, or even taking complete control of your system. This could lead to devastating consequences like data breaches, resource hijacking, or total operational shutdown.

Put simply

Think of it as a delivery driver who can not only drop off packages but also step inside and do whatever they want in your house if they receive the right, albeit forged, delivery instructions. That could lead to chaos! This remote code execution vulnerability allows attackers to send specially crafted network packets to the Unified Remote service on port 9512, enabling them to open a command prompt and execute malicious payloads.

What to do

An attacker could execute arbitrary commands, potentially accessing sensitive data, installing malware, or even taking complete control of your system. This could lead to devastating consequences like data breaches, resource hijacking, or total operational shutdown. To secure your system, immediately update Unified Remote to the latest version to patch this vulnerability. Additionally, consider restricting access to port 9512 and implementing firewall rules that limit inbound connections. Regularly audit your security settings to prevent future issues. You've got this! With these steps, you can lock down your system and keep it safe from attackers. 🛡️

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00947 · 60.8th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-01-23T16:47Z
EPSS history
Timeline
  • 23 JAN 16:47Z
    Unified Remote 3.9.0.2463 - Remote Code Execution
    cvelistv5