CVE-2010-3962KEV · OVERDUE

Microsoft Internet Explorer Uninitialized Memory Corruption Vulnerability

High · published November 5, 2010

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 8.1. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

361
days past CISA
deadline
CVSS v3.1
8.1
EPSS
97%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 A sneaky use-after-free vulnerability in Internet Explorer could let attackers execute arbitrary code just by tampering with CSS! ⚡ Think of it like a restaurant that mistakenly leaves an order in the system even after it’s been served, allowing anyone to place a new order under the same name — if you know what to do, you can get whatever you want. 🍽️ This flaw opens the door wide for remote attackers to take control of your system, leading to potentially catastrophic consequences like data theft, unauthorized access, or even a complete system takeover. It's a real nightmare scenario!

Put simply

Think of it like a restaurant that mistakenly leaves an order in the system even after it’s been served, allowing anyone to place a new order under the same name — if you know what to do, you can get whatever you want. 🍽️ The vulnerability arises from improper handling of memory in Internet Explorer when dealing with Cascading Style Sheets, specifically relating to the clip attribute, allowing execution of arbitrary code on the victim's machine.

What to do

This flaw opens the door wide for remote attackers to take control of your system, leading to potentially catastrophic consequences like data theft, unauthorized access, or even a complete system takeover. It's a real nightmare scenario! Immediately upgrade to a newer version of Internet Explorer (consider switching to Edge) or apply available patches. Regularly update your system to ensure protection against such exploits. 🛡️ You've got this! By taking these steps, you can secure your system and keep those nasty attackers at bay! 🔒

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.96831 · 99.9th percentile
Published
2010-11-05T16:28Z
KEV added
2025-10-06 · due 2025-10-27
EPSS history
Timeline
  • 06 OCT 00:00Z
    Added to CISA KEV — remediate by Oct 27
    kev
  • 05 NOV 16:28Z
    Use-after-free vulnerability in Microsoft Internet Explorer 6, 7, and 8 allows remote attackers to execute arbitrary code via vectors related to Cascading…
    cvelistv5