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1 vulnerability found for DnsServer by Technitium
CVE-2026-42255 (GCVE-0-2026-42255)
Vulnerability from cvelistv5 – Published: 2026-04-26 02:48 – Updated: 2026-04-27 13:31
VLAI
EPSS
VEX
Summary
Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:20 UTC
CWE
- CWE-684 - Incorrect Provision of Specified Functionality
Assigner
mitre
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Technitium | DnsServer |
Affected:
0 , < 15.0.0
(custom)
cpe:2.3:a:technitium:dnsserver:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-42255",
"options": [
{
"Exploitation": "none"
},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-27T13:20:27.700885Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-04-27T13:31:57.425Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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"product": "DnsServer",
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"version": "0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
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"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:technitium:dnsserver:*:*:*:*:*:*:*:*",
"versionEndExcluding": "15.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Technitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 7.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
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"problemTypes": [
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"descriptions": [
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"description": "CWE-684 Incorrect Provision of Specified Functionality",
"lang": "en",
"type": "CWE"
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]
}
],
"providerMetadata": {
"dateUpdated": "2026-04-26T03:10:30.349Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/TechnitiumSoftware/DnsServer/blob/master/CHANGELOG.md#technitium-dns-server-change-log"
}
],
"x_generator": {
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},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2026-42255",
"datePublished": "2026-04-26T02:48:44.810Z",
"dateReserved": "2026-04-26T02:48:44.278Z",
"dateUpdated": "2026-04-27T13:31:57.425Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}