Known exploited vulnerability
CVE-2013-3918
The short answer
CVE-2013-3918 affects n/a n/a and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-10-06: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
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.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Oct 6, 2025
Federal due date Oct 27, 2025
EPSS, next 30 days
74%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
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
n/a. NVD's record lists the exact affected versions.
References
- docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-090 PatchVendor Advisory
- isc.sans.edu/forums/diary/16985 Third Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19089 Broken LinkThird Party Advisory
- docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-090 PatchVendor Advisory
- isc.sans.edu/forums/diary/16985 Third Party Advisory
- oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19089 Broken LinkThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2013-3918 US Government Resource
- www.microsoft.com/en-us/msrc/blog/2013/11/technical-details-of-the-targeted-attack-using-ie-vulnerability-cve-2013-3918/ Vendor Advisory
Questions
Is CVE-2013-3918 being exploited?
Yes. CISA added CVE-2013-3918 to its Known Exploited Vulnerabilities catalog on 2025-10-06, with a federal remediation due date of 2025-10-27.
How do I fix CVE-2013-3918?
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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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