CVE•Published 2026-04-14•Modified 2026-05-07•0 articles on news•6 live references•NVD data
CVE-2026-23666Microsoft · .net_framework
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
28
Exploit Prediction Scoring System · top 72% of all CVEs
Weaknesses (CWE)
Description
Improper input validation in .NET Framework allows an unauthorized attacker to deny service over a network.
Timeline
Published 2026-04-14
Modified 2026-05-07
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-23666Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Microsoft .net Framework" version:"3.5"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:".net Framework"HTTP body or banner mentions ".net Framework" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-23666Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-23666Censys host search filtered to this CVE id.
grep.app
CVE-2026-23666Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-23666GitHub code search for direct mentions.
Google dork
"CVE-2026-23666" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (2)
We haven't classified any articles referencing CVE-2026-23666 yet. The external references above still apply.