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CVE-2023-24880

Windows SmartScreen Security Feature Bypass Vulnerability

MEDIUM
4.4
CVSS Score
Published: March 14, 2023 at 04:55 PM UTC
Updated: June 17, 2026 at 05:40 AM UTC
10 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows 10 1809

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Severity
MEDIUM4.4
Exploitation
CISA KEV
Exploit prediction
EPSS 78%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score78.0%

EPSS (Exploit Prediction Scoring System) estimates a 78.0% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Known
Added to KEV
Mar 14, 2023
Remediation Due
Apr 4, 2023
1304 days overdue
Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-24880
https://nvd.nist.gov/vuln/detail/CVE-2023-24880

Description

Windows SmartScreen Security Feature Bypass Vulnerability

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10 1607· Microsoft
95%
v < 10.0.14393.578610.0.14393.0 ≤ v < 10.0.14393.578610.0.14393.0
Affected range stops below 10.0.14393.5786, so it looks safe — our inference, not a vendor statement
Windows 10 1809· Microsoft
95%
v < 10.0.17763.413110.0.0 ≤ v < 10.0.17763.413110.0.17763.0 ≤ v < 10.0.17763.413110.0.010.0.17763.0
Affected range stops below 10.0.17763.4131, so it looks safe — our inference, not a vendor statement
Windows 10 20H2· Microsoft
95%
v < 10.0.19042.272810.0.0 ≤ v < 10.0.19042.272810.0.0
Affected range stops below 10.0.19042.2728, so it looks safe — our inference, not a vendor statement
Windows 10 21H2· Microsoft
95%
v < 10.0.19044.272810.0.19043.0 ≤ v < 10.0.19044.272810.0.19043.0
Affected range stops below 10.0.19044.2728, so it looks safe — our inference, not a vendor statement
Windows 10 22H2· Microsoft
95%
v < 10.0.19045.272810.0.19045.0 ≤ v < 10.0.19045.272810.0.19045.0
Affected range stops below 10.0.19045.2728, so it looks safe — our inference, not a vendor statement
Windows 11 21H2· Microsoft
95%
v < 10.0.22000.169610.0.0 ≤ v < 10.0.22000.169610.0.0
Affected range stops below 10.0.22000.1696, so it looks safe — our inference, not a vendor statement
Windows 11 22H2· Microsoft
95%
v < 10.0.22000.141310.0.22621.0 ≤ v < 10.0.22621.141310.0.22621.0
Affected range stops below 10.0.22000.1413, so it looks safe — our inference, not a vendor statement
Affected range stops below 10.0.22621.1413, so it looks safe — our inference, not a vendor statement
Windows Server 2016· Microsoft
95%
v < 10.0.14393.578610.0.14393.0 ≤ v < 10.0.14393.578610.0.14393.0
Affected range stops below 10.0.14393.5786, so it looks safe — our inference, not a vendor statement
Windows Server 2019· Microsoft
95%
v < 10.0.17763.413110.0.17763.0 ≤ v < 10.0.17763.413110.0.17763.0
Affected range stops below 10.0.17763.4131, so it looks safe — our inference, not a vendor statement
Windows Server 2022· Microsoft
95%
v < 10.0.20348.160210.0.20348.0 ≤ v < 10.0.20348.160710.0.20348.0
Affected range stops below 10.0.20348.1607, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24880
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24880

SSVC — Action Prioritization

SSVCActiveNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.4MEDIUMmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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