{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45557","assignerOrgId":"9119a7d8-5eab-497f-8521-727c672e3725","state":"PUBLISHED","assignerShortName":"cisa-cg","dateReserved":"2026-05-12T18:08:43.759Z","datePublished":"2026-05-19T13:47:47.291Z","dateUpdated":"2026-05-19T14:57:56.327Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Technitium DNS Server aggressively tries to fetch missing RRSIG records or mismatched DNSKEY records. An attacker in control of a domain can cause a vulnerable system to generate excessive network traffic. Fixed in 15.0."}],"affected":[{"vendor":"Technitium","product":"DNS Server","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"15.0","versionType":"custom"},{"version":"15.0","status":"unaffected"}]}],"problemTypes":[{"descriptions":[{"description":"CWE-405 Asymmetric Resource Consumption (Amplification)","lang":"en","type":"CWE","cweId":"CWE-405"}]},{"descriptions":[{"description":"CWE-406 Insufficient Control of Network Message Volume (Network Amplification)","lang":"en","type":"CWE","cweId":"CWE-406"}]},{"descriptions":[{"description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE","cweId":"CWE-770"}]}],"metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":5.8,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"LOW","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"cvssV4_0":{"version":"4.0","baseScore":6.9,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L","userInteraction":"NONE","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","subIntegrityImpact":"NONE","vulnIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","vulnConfidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-05-18T22:28:44.941438Z","id":"CVE-2026-45557","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"Technitium DNS Server excessive DNSSEC requests","references":[{"name":"url","url":"https://github.com/TechnitiumSoftware/DnsServer/blo/master/CHANGELOG.md#version-150","tags":["patch"]},{"name":"url","url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-138-02.json"},{"name":"url","url":"https://www.cve.org/CVERecord?id=CVE-2026-45557"}],"credits":[{"value":"Shuhan Zhang, Tsinghua University","lang":"en"},{"value":"Dan Li, Tsinghua University","lang":"en"},{"value":"Baojun Liu, Tsinghua University","lang":"en"}],"datePublic":"2026-05-19T00:00:00.000Z","providerMetadata":{"orgId":"9119a7d8-5eab-497f-8521-727c672e3725","shortName":"cisa-cg","dateUpdated":"2026-05-19T13:47:47.291Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-19T14:53:37.637177Z","id":"CVE-2026-45557","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-19T14:57:56.327Z"}}]}}