CVE-2023-33778

Draytek Vigor Routers firmware versions below 3.9.6/4.2.4, Access Points firmware versions below v1.4.0, Switches firmware versions below 2.6.7, and Myvigor…

Critical · published June 1, 2023

CVSS v3.1
9.8
EPSS
1%
Percentile
47.7
In the wild
Unconfirmed
What it is

🔥 Hold onto your routers, because hardcoded encryption keys are allowing attackers to hijack devices like it's a video game cheat code! 🚨 This vulnerability is like a hotel giving out the same room key to all guests, allowing anyone to enter any room at will. Without unique keys, your personal space is completely up for grabs. An attacker can bind their own account to any vulnerable Draytek device, gaining full control to create WCF and DrayDDNS licenses. This means they can manipulate your network settings and data without breaking a sweat, leaving your home or business wide open to exploitation!

Put simply

This vulnerability is like a hotel giving out the same room key to all guests, allowing anyone to enter any room at will. Without unique keys, your personal space is completely up for grabs. CVE-2023-33778 reveals that Draytek devices with firmware versions below certain thresholds rely on hardcoded encryption keys, permitting unauthorized users to gain access and control over the affected devices.

What to do

An attacker can bind their own account to any vulnerable Draytek device, gaining full control to create WCF and DrayDDNS licenses. This means they can manipulate your network settings and data without breaking a sweat, leaving your home or business wide open to exploitation! Immediately upgrade your Draytek Vigor Routers to firmware version 3.9.6 or later, Access Points to 1.4.0 or later, Switches to 2.6.7 or later, and Myvigor devices to 2.3.2 or later. It’s crucial to change any default credentials and review your account settings afterwards! You've got this! Secure your devices now, and you'll be a security hero in no time! 🦸‍♂️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00594 · 47.7th percentile
Published
2023-06-01T00:00Z
EPSS history
Timeline
  • 01 JUN 00:00Z
    Draytek Vigor Routers firmware versions below 3.9.6/4.2.4, Access Points firmware versions below v1.4.0, Switches firmware versions below 2.6.7, and Myvigor…
    cvelistv5