CVE•Published 2026-08-26•Modified 2026-09-08•0 articles on news•4 live references•NVD data
CVE-2026-19538Nlnetlabs · Nsd
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:H/A:N
EPSS percentile
28
Exploit Prediction Scoring System · top 72% of all CVEs
Weaknesses (CWE)
Description
The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept open.
Timeline
Published 2026-08-26
Modified 2026-09-08
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). Live host counts are a Premium feature.
Shodan · vuln tag
vuln:CVE-2026-19538Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Nlnetlabs Nsd"All exposed Nlnetlabs Nsd instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Nsd"HTTP body or banner mentions "Nsd" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-19538Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-19538Censys host search filtered to this CVE id.
grep.app
CVE-2026-19538Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-19538GitHub code search for direct mentions.
Google dork
"CVE-2026-19538" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-19538 on GitHub.
We haven't classified any articles referencing CVE-2026-19538 yet. The external references above still apply.