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CVE-2026-45557

Technitium DNS Server excessive DNSSEC requests

Published: May 19, 2026Updated: May 19, 2026 Sources: CVE List NVD csafCWE-405
5.8MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 69.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-405CWE-406CWE-770

Affected Products

Technitium
commercialaka dnsserver, dns server
DNS ServerOn-prem
Networking Infrastructure / dns-dhcp-ntp

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/TechnitiumSoftware/DnsServer/blo/master/CHANGELOG.md#version-150
github.com
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-138-02.json
raw.githubusercontent.com
https://www.cve.org/CVERecord?id=CVE-2026-45557
cve.org
and 1 more references View all →
News mentions
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