CVE-2024-30040KEV · OVERDUECWE-20

Windows MSHTML Platform Security Feature Bypass Vulnerability

High · published May 14, 2024

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.8. It is confirmed in active exploitation. It sits in the 90.3th percentile for exploit probability.

872
days past CISA
deadline
CVSS v3.1
8.8
EPSS
4%
Percentile
90.3
In the wild
Confirmed
What it is

🚨 A crafty bypass in the Windows MSHTML platform is leaving users wide open to exploitation! ⚡ Think of it like a hotel with a side entrance that the staff forgot to lock. Anyone with insider knowledge can stroll right into the lobby without a keycard, bypassing all security measures! An attacker could exploit this vulnerability to bypass critical security features and gain unauthorized access to sensitive data, potentially leading to full system compromise. This could mean a nightmare scenario where malware spreads, data leaks occur, or your personal information is at risk.

Put simply

Think of it like a hotel with a side entrance that the staff forgot to lock. Anyone with insider knowledge can stroll right into the lobby without a keycard, bypassing all security measures! The vulnerability allows unauthorized users to bypass security features in the MSHTML platform, enabling them to execute malicious code without proper validation and controls in place. Essentially, it's a backdoor that shouldn't exist!

What to do

An attacker could exploit this vulnerability to bypass critical security features and gain unauthorized access to sensitive data, potentially leading to full system compromise. This could mean a nightmare scenario where malware spreads, data leaks occur, or your personal information is at risk. Patch your systems to the latest version provided by Microsoft immediately, prioritize installing this update, and check your configurations to ensure no unauthorized access points are available. Don't forget to educate users about potential phishing attacks that may exploit the vulnerability! You've got this! Just follow these steps, and you'll have your systems locked down in no time! 🛡️

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.03939 · 90.3th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2024-05-14T16:57Z
KEV added
2024-05-14 · due 2024-06-04
EPSS history
Timeline
  • 14 MAY 16:57Z
    Windows MSHTML Platform Security Feature Bypass Vulnerability
    cvelistv5
  • 14 MAY 00:00Z
    Added to CISA KEV — remediate by Jun 4
    kev