CVE-2021-20123KEV · OVERDUE

Draytek VigorConnect Path Traversal Vulnerability

High · published October 13, 2021

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.5. It is confirmed in active exploitation. It sits in the 99.8th percentile for exploit probability.

760
days past CISA
deadline
CVSS v3.1
7.5
EPSS
90%
Percentile
99.8
In the wild
Confirmed
What it is

🚨 Unauthenticated attackers can snatch any file they want from your system with just one request! The Draytek VigorConnect's DownloadFileServlet is a serious security hole that needs your attention. 🔥 Think of it like having a hotel room key that opens every door in the building without any checks! An attacker can waltz in and grab sensitive files directly from the operating system, instead of just their own room. 🏨 This is absolutely devastating! If exploited, an attacker could gain access to critical system files, potentially leading to data breaches or unauthorized access to the entire network. Imagine all your sensitive information being at their fingertips! ⚡

Put simply

Think of it like having a hotel room key that opens every door in the building without any checks! An attacker can waltz in and grab sensitive files directly from the operating system, instead of just their own room. 🏨 This local file inclusion vulnerability allows unauthenticated attackers to download arbitrary files by manipulating the file download functionality of the DownloadFileServlet in Draytek VigorConnect 1.6.0-B3.

What to do

This is absolutely devastating! If exploited, an attacker could gain access to critical system files, potentially leading to data breaches or unauthorized access to the entire network. Imagine all your sensitive information being at their fingertips! ⚡ Immediate action is needed! Patch your system to the latest version of VigorConnect to fix this vulnerability. Ensure that only authenticated users can access the DownloadFileServlet, and consider implementing strict file validation. 🛡️ You can tackle this! Follow these steps and you'll have your system secured in no time. You've got this! 💪

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.90234 · 99.8th percentile
Published
2021-10-13T15:47Z
KEV added
2024-09-03 · due 2024-09-24
EPSS history
Timeline
  • 25 AUG 00:00Z
    EPSS moved 75% → 90%
    epss
  • 03 SEP 00:00Z
    Added to CISA KEV — remediate by Sep 24
    kev
  • 13 OCT 15:47Z
    A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint
    cvelistv5