CVE•Published 2026-05-12•Modified 2026-05-13•0 articles on news•6 live references•NVD data
CVE-2026-42899Microsoft · .net
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
—
Weaknesses (CWE)
Description
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Timeline
Published 2026-05-12
Modified 2026-05-13
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-2026-42899Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Microsoft .net"All exposed Microsoft .net instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:".net"HTTP body or banner mentions ".net" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-42899Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42899Censys host search filtered to this CVE id.
grep.app
CVE-2026-42899Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42899GitHub code search for direct mentions.
Google dork
"CVE-2026-42899" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42899 on GitHub.
We haven't classified any articles referencing CVE-2026-42899 yet. The external references above still apply.