CVE-2023-24880
Microsoft Windows SmartScreen Security Feature Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 4 April 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Windows SmartScreen Security Feature Bypass Vulnerability
- CVSS 3.1
- 4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- EPSS
- 78.00% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 14 March 2023 · due 4 April 2023 · used in ransomware campaigns
- Weakness
- CWE-863
- Affected
- microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 20h2 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022
- Source
- secure@microsoft.com
EPSS 78.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-24880; https://nvd.nist.gov/vuln/detail/CVE-2023-24880
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24880Patch, Vendor Advisory
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-24880Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-24880US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.