CVE-2019-0604KEV · OVERDUE

Microsoft SharePoint Remote Code Execution Vulnerability

Critical · published March 6, 2019

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 100.0th percentile for exploit probability.

1634
days past CISA
deadline
CVSS v3.1
9.8
EPSS
100%
Percentile
100.0
In the wild
Confirmed
What it is

🔥 A sneaky oversight in Microsoft SharePoint allows remote code execution with just a single crafted application package! This vulnerability is like a hotel receptionist who skips verifying guests' IDs, letting anyone check into any room they want. If an attacker packages malicious code into SharePoint, it’s as if they’ve created their own master key to every suite! The consequences could be absolutely devastating: an attacker could execute arbitrary code on the server, potentially leading to complete system compromise, sensitive data breaches, or even a full takeover of the application. Imagine unauthorized users running rampant, accessing files, altering configurations, or worse—destroying data!

Put simply

This vulnerability is like a hotel receptionist who skips verifying guests' IDs, letting anyone check into any room they want. If an attacker packages malicious code into SharePoint, it’s as if they’ve created their own master key to every suite! This critical remote code execution vulnerability occurs because Microsoft SharePoint does not properly validate the source markup of application packages, allowing malicious payloads to be executed without sufficient checks.

What to do

The consequences could be absolutely devastating: an attacker could execute arbitrary code on the server, potentially leading to complete system compromise, sensitive data breaches, or even a full takeover of the application. Imagine unauthorized users running rampant, accessing files, altering configurations, or worse—destroying data! To protect your systems, patch immediately to the latest version of SharePoint that addresses CVE-2019-0604. Ensure your application packages are thoroughly vetted, and consider implementing additional security measures like application whitelisting. Don't delay—this is a serious risk! You've got this! With these steps, you'll have your SharePoint secured 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
0.99913 · 100.0th percentile
Published
2019-03-06T00:00Z
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
  • 06 MAR 00:00Z
    A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package, aka…
    cvelistv5