ExploitedIn CISA KEVFix available

CVE-2013-3918

Exploitation confirmed. First attested on 2013-11-12 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2013-11-12
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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."

Timeline

dates in UTC

2013-11-1201:00Listed as exploited by GCVEGCVE
2013-11-1201:00Exploitation first reportedGCVE
2013-11-1214:35CVE publishedNVD
2025-10-0403:55SSVC exploitation set to activeCISA-ADP
2025-10-06Added to the CISA KEV catalogCISA KEV
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2013-3918?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2013-3918?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows server 2008

Branch	Affected	Fixed in	Source
—	= r2	no fix published	NVD
—	= sp2	no fix published	NVD

Microsoft windows server 2012

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD
—	= r2	no fix published	NVD

Microsoft windows 7

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

7 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s 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.due 2025-10-27

Advisories and patches

docs.microsoft.comPatch · Vendor Advisory
www.microsoft.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2025-10-06
Patch Due Date: 2025-10-27
Ransomware Use: Unknown
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.

Sources

CISA KEVKEV entry2025-10-06
GCVEexploitation2013-11-12
CISA-ADPSSVC decisionactive2025-10-04
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-10-03
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CISA-ADPweakness (CWE)CWE-7872025-10-03
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score73.7 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2013-11-12
Last Modified: 2026-06-16
NVD status: Analyzed

Frequently asked questions

What is CVE-2013-3918?

Is CVE-2013-3918 actively exploited?

Yes. CVE-2013-3918 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-10-27.

What is the CVSS score for CVE-2013-3918?

CVE-2013-3918 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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