CVE-2023-24880
KEVRansomware UseMicrosoft Windows SmartScreen Security Feature Bypass Vulnerability
Description
Microsoft Windows SmartScreen contains a security feature bypass vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file.
Windows SmartScreen Security Feature Bypass Vulnerability
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:LPublishedMar 14, 2023
Last modifiedJun 17, 2026
Added to KEVMar 14, 2023
Remediation dueApr 4, 2023
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24880PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24880US Government Resource
0 recent articles mention this CVE
70
Risk assessment · High
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 1302 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 4.4 MEDIUM
- EPSS (30-day exploit probability)
- 78.0% · top 1% of all CVEs
- Weakness
- CWE-863
Recommended actions
- 1.Apply updates per vendor instructions.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 4.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.