CVE-2013-3918 Microsoft Windows Out-of-Bounds Write
Remote attackers can execute arbitrary code or cause denial of service via a crafted web page exploiting an out-of-bounds write in the InformationCardSigninHelper ActiveX control.
- Exploited in the wild
- Since 6 Oct 2025
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2013-3918?
CVE-2013-3918 is a high-severity memory corruption vulnerability in Microsoft Windows 7, published on 12 Nov 2013. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The InformationCardSigninHelper Class ActiveX control in icardie.dll in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds write) via a crafted web page that is accessed by Internet Explorer, as exploited in the wild in November 2013, aka "InformationCardSigninHelper Vulnerability."
Weakness: CWE-787
Which versions are affected by CVE-2013-3918?
It affects 10 products.
Products include Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 8.1, Microsoft Windows Rt, Microsoft Windows Rt 8.1, Microsoft Windows Server 2003 and 4 more.
How do I fix CVE-2013-3918?
No fix has been published for CVE-2013-3918 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 27 Oct 2025.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2013-3918 being exploited?
Yes. Attackers have exploited CVE-2013-3918 in the wild since at least 6 Oct 2025.
Public exploit code: 1 Metasploit module and 1 Exploit-DB entry.
Other vulnerabilities in Microsoft Windows 7
- CVE-2015-1635 Microsoft HTTP.sys Remote Code Execution
- CVE-2015-2360 Microsoft Win32k Privilege Escalation
- CVE-2014-6324 Microsoft Kerberos Key Distribution Center (KDC) Privilege Escalation
- CVE-2014-6332 Microsoft Windows Object Linking & Embedding (OLE) Automation Array Remote Code Execution
- CVE-2014-4148 Microsoft Windows Remote Code Execution
Sources
Also known as GHSA-7627-vgq8-rcjv.