CVE-2013-3918: in the CISA KEV catalogue
Microsoft Windows Out-of-Bounds Write Vulnerability. CISA added CVE-2013-3918 to the Known Exploited Vulnerabilities catalogue on 2025-10-06 with a default due date of 2025-10-27. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control, icardie.dll. An attacker could exploit the vulnerability by constructing a specially crafted webpage. When a user views the webpage, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization. (CISA description)
- Vendor / product
- Microsoft Windows
- CWE
- Not listed
- CISA 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.
- EPSS
- 74%, percentile 99 (scored 2026-11-03)
EPSS puts about 74 in 100 odds (74%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2013-3918 in the CISA KEV catalogue?
Yes. CISA added CVE-2013-3918 (Microsoft Windows Out-of-Bounds Write Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2025-10-06. CISA's default due date for it is 2025-10-27.
Is CVE-2013-3918 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2013-3918. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about 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.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2013-3918