CVE•Published 2026-04-26•Modified 2026-10-26•0 articles on news•3 live references•NVD data

CVE-2026-42255Technitium · Dnsserver

Vulnerability data via NVD (ingested)

CVSS v3.1

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

EPSS percentile

Exploit Prediction Scoring System · top 72% of all CVEs

Weaknesses (CWE)

CWE-684Incorrect Provision of Specified Functionality

Description

Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.

Timeline

Published 2026-04-26

Modified 2026-10-26

External references

NVD MITRE VulnCheck

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-2026-42255

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Technitium Dnsserver"

All exposed Technitium Dnsserver instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Dnsserver"

HTTP body or banner mentions "Dnsserver" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-42255

Country / ASN / product breakdown for the vuln query.

Censys

vulnerabilities.cve_id: CVE-2026-42255

Censys host search filtered to this CVE id.

grep.app

CVE-2026-42255

Public source-code mentions — fast PoC discovery.

GitHub code

CVE-2026-42255

GitHub code search for direct mentions.

Google dork

"CVE-2026-42255" exploit -site:nvd.nist.gov

Write-ups and news, NVD excluded.

Known PoCs on GitHub

No public proof-of-concept repositories found for CVE-2026-42255 on GitHub.

We haven't classified any articles referencing CVE-2026-42255 yet. The external references above still apply.