Microsoft Windows Out-of-Bounds Write Vulnerability (CVE-2013-3918)
Severity: high · Patch status: patched · Since 2025-10-06 · CVE-2013-3918
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 added CVE-2013-3918 to its Known Exploited Vulnerabilities catalog on Oct 6, 2025, which means attackers are exploiting it in the wild.
What 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.
- US federal agencies must remediate by Oct 27, 2025 (BOD 22-01); treat that as the outer limit.
Sources
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