CVE-2023-32049: Windows SmartScreen security feature bypass

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: medium.

high priorityIt is in CISA KEV with confirmed in-the-wild exploitation and a high CVSS score, but requires user interaction and the record lacks technical detail on the bypass mechanism.

What it is

CVE-2023-32049 is a security feature bypass in Microsoft Windows SmartScreen, the component that warns users about untrusted files and downloads. A successful bypass undermines that warning, letting a malicious file run without the expected SmartScreen prompt. It affects a broad set of Windows 10, Windows 11 and Windows Server releases.

Impact

An attacker can evade SmartScreen reputation and warning checks so a user opens or runs a malicious file that would normally be flagged. The CVSS vector rates high confidentiality, integrity and availability impact, though the record gives no further detail on the exact mechanism.

Attack surface

Reached over the network (AV:N) with no privileges required (PR:N), but user interaction is required (UI:R), meaning the victim must open or execute the crafted content. No authentication is needed on the attacker side.

Exploitation

CISA added this to the Known Exploited Vulnerabilities catalog on 2023-07-11 with a remediation due date of 2023-08-01, indicating exploitation in the wild. EPSS 30-day probability is about 4.2 percent (90th percentile); no ransomware campaign use is recorded.

What to do

• Apply the Microsoft updates referenced in the MSRC advisory for all affected Windows 10, Windows 11 and Windows Server versions.
• Prioritize patching internet-facing and user-facing endpoints, since exploitation requires a user to open crafted content.
• Where patching is delayed, restrict execution of untrusted downloads and enforce application allowlisting.
• Keep SmartScreen and Defender protections enabled and current, and treat SmartScreen bypasses as a reason to scrutinize email and web-delivered files.

Detection

• Monitor for processes executing files from download or temp directories that bypass normal SmartScreen prompts.
• Alert on SmartScreen or Defender events indicating a warning was suppressed or a reputation check failed.
• Hunt for email or web-delivered files that execute shortly after download with no user-facing security prompt.
• Correlate endpoint execution telemetry with known CVE-2023-32049 exploitation indicators from vendor and CISA guidance.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.