CVE-2013-3918KEV · OVERDUE

Microsoft Windows Out-of-Bounds Write Vulnerability

High · published November 12, 2013

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 99.5th percentile for exploit probability.

361
days past CISA
deadline
CVSS v3.1
8.8
EPSS
74%
Percentile
99.5
In the wild
Confirmed
What it is

🚨 A crafted web page is all it takes to unleash chaos! This vulnerability in the InformationCardSigninHelper Class lets attackers execute arbitrary code remotely — like letting a burglar into your living room through a window you forgot to lock! 🔥 Think of this vulnerability like a hotel receptionist who blindly checks in guests with fake IDs. If they don’t verify who’s really at the door, anyone could stroll in and wreak havoc! If exploited, an attacker could execute any code on your system, leading to unauthorized access or even a complete system takeover. This is absolutely devastating for any setup, as it could allow malicious actors to steal data or launch further attacks from your machine!

Put simply

Think of this vulnerability like a hotel receptionist who blindly checks in guests with fake IDs. If they don’t verify who’s really at the door, anyone could stroll in and wreak havoc! This vulnerability allows remote attackers to execute arbitrary code via an out-of-bounds write when processing a crafted web page in Internet Explorer by exploiting the InformationCardSigninHelper ActiveX control in icardie.dll.

What to do

If exploited, an attacker could execute any code on your system, leading to unauthorized access or even a complete system takeover. This is absolutely devastating for any setup, as it could allow malicious actors to steal data or launch further attacks from your machine! Immediately disable the ActiveX control if you’re still using older versions of Windows. Make sure to apply all relevant security updates and patches for your system, especially updates that address this vulnerability. Additionally, consider upgrading to a more secure operating system if possible. You've got this! Follow these steps, and you'll be back in the safety zone 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
CVSS v4.0
Not supplied
EPSS
0.73693 · 99.5th percentile
Published
2013-11-12T01:00Z
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
  • 12 NOV 01:00Z
    The InformationCardSigninHelper Class ActiveX control in icardie.dll in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows…
    cvelistv5