CVE-2013-3918: Microsoft Windows Out-of-Bounds Write Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
CSIRTS triage
- What
- Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control.
- Who is affected
- Users of Microsoft Windows with the affected ActiveX control.
- Urgency
- Remediation is critical as the vulnerability is actively exploited.
- Action
- Discontinue use of the affected product or apply the latest security updates.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2013-3918
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2013-3918Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2013-3918 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Microsoft Windows Out-of-Bounds
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- criticalexploitedCVE-2023-36424: Microsoft Windows Out-of-Bounds Read Vulnerabilitycisa-kev · 2026-04-13
- criticalexploitedCVE-2025-24991: Microsoft Windows NTFS Out-Of-Bounds Read Vulnerabilitycisa-kev · 2025-03-11
- criticalexploitedCVE-2018-8174: Microsoft Windows VBScript Engine Out-of-Bounds Write Vulnerabilitycisa-kev · 2022-02-15
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