CVE-2013-3918
HighExploitedPublic exploitThe 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…
Published Nov 12, 2013 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2013-3918 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Windows 7 (Microsoft), Windows 8 (Microsoft), Windows 8.1 (Microsoft) and 7 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 12, 2013. Public exploit code is available.
- EPSS estimates a 74% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
74%
Higher than 99.4% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2013-3918 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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."
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 6, 2025 | Oct 27, 2025 | Not reported |
| Industry KEV feed | Nov 12, 2013 | Oct 27, 2025 | Not reported |
| CIRCL KEV | Nov 12, 2013 | Oct 27, 2025 | Not reported |
| ENISA EUVD | Oct 6, 2025 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 7Microsoft | See advisory | n/a |
| Windows 8Microsoft | See advisory | n/a |
| Windows 8.1Microsoft | See advisory | n/a |
| Windows RtMicrosoft | See advisory | n/a |
| Windows Rt 8.1Microsoft | See advisory | n/a |
Timeline
Publicly disclosed
Nov 12, 2013
Added to Industry KEV feed
Nov 12, 2013
Added to CIRCL KEV
Nov 12, 2013
Added to CISA KEV
Oct 6, 2025
Added to ENISA EUVD
Oct 6, 2025
Last updated
Apr 22, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryhttp://blogs.technet.com/b/msrc/archive/2013/11/11/activex-control-issue-being-addressed-in-update-tuesday.aspx
- advisoryhttps://isc.sans.edu/forums/diary/16985
- advisoryoval:org.mitre.oval:def:19089
- advisoryhttps://www.microsoft.com/en-us/msrc/blog/2013/11/technical-details-of-the-targeted-attack-using-ie-vulnerability-cve-2013-3918/
- advisoryhttp://www.fireeye.com/blog/technical/2013/11/new-ie-zero-day-found-in-watering-hole-attack.html
FAQ
Common Questions.
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 execut…
Affected: Windows 7 (Microsoft); Windows 8 (Microsoft); Windows 8.1 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Nov 12, 2013.
Yes. It was added on Oct 6, 2025 with a federal remediation due date of Oct 27, 2025.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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