CVE-2020-0646KEV · OVERDUE

Microsoft .NET Framework Remote Code Execution Vulnerability

Critical · published January 14, 2020

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
9.8
EPSS
99%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 Input validation? More like input vacation! This remote code execution vulnerability in the Microsoft .NET Framework is a glaring hole that attackers are exploiting — and it’s a big one! 🔥 Think of the .NET Framework as a restaurant kitchen where chefs follow recipes. If they don't check the ingredients carefully, anyone could slip in a surprise ingredient — and trust me, that’s a recipe for disaster! An attacker can exploit this vulnerability to run arbitrary code on the server, potentially gaining full control over the system. This could lead to the theft of sensitive data, unauthorized access to private information, or even total system compromise. Yikes!

Put simply

Think of the .NET Framework as a restaurant kitchen where chefs follow recipes. If they don't check the ingredients carefully, anyone could slip in a surprise ingredient — and trust me, that’s a recipe for disaster! This critical RCE vulnerability arises from the .NET Framework's failure to properly validate input, allowing attackers to inject malicious code that the system processes without question.

What to do

An attacker can exploit this vulnerability to run arbitrary code on the server, potentially gaining full control over the system. This could lead to the theft of sensitive data, unauthorized access to private information, or even total system compromise. Yikes! To safeguard your systems, update to the latest version of the .NET Framework immediately. Ensure you configure input validation mechanisms to enforce strict checks on data inputs, and review your application's security posture. Don't wait! You've got this! Follow these steps, 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
0.99222 · 99.9th percentile
Published
2020-01-14T23:11Z
KEV added
2021-11-03 · due 2022-05-03
EPSS history
Timeline
  • 03 NOV 00:00Z
    Added to CISA KEV — remediate by May 3
    kev
  • 14 JAN 23:11Z
    A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution…
    cvelistv5