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Vulnerability record · CVE-2023-49203 · published 18 September 2024

CVE-2023-49203: Technitium dnsserver vulnerability

Technitium · Dnsserver

Technitium 11.5.3 allows remote attackers to cause a denial of service (bandwidth amplification) because the DNSBomb manipulation causes accumulation of low-rate DNS queries such that there is a large-sized response in a burst of traffic.

7.5 CVSS 3.1 High EPSS 0.65% · top 51.0% CWE-406 · CWE-406
7.5CVSS 3.1 base score
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

Technitium 11.5.3 allows remote attackers to cause a denial of service (bandwidth amplification) because the DNSBomb manipulation causes accumulation of low-rate DNS queries such that there is a large-sized response in a burst of traffic.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/idealeer/89947ca07836fd0f7e9761198ca9a0f3. Broken Link
https://technitium.com/dns/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2025-50334Technitium dnsserver allocation without limits vulnerabilityAn issue in Technitium DNS Server v.13.5 allows a remote attacker to cause a denial of service via the rate-limiting componentEPSS 1.1%7.5CVE-2024-56089Technitium dnsserver vulnerabilityAn issue in Technitium through v13.2.2 enables attackers to conduct a DNS cache poisoning attack and inject fake responses by reviving the birthday a…EPSS 0.32%7.5CVE-2023-28455Technitium dnsserver vulnerabilityAn issue was discovered in Technitium through 11.0.2. The forwarding mode enables attackers to create a query loop using Technitium resolvers, launch…EPSS 0.53%7.5CVE-2023-28456Technitium dnsserver vulnerabilityAn issue was discovered in Technitium through 11.0.2. It enables attackers to launch amplification attacks (3 times more than other "golden model" so…EPSS 0.54%7.5CVE-2023-28457Technitium dnsserver insufficient verification of data authenticity vulnerabilityAn issue was discovered in Technitium through 11.0.3. It enables attackers to conduct a DNS cache poisoning attack and inject fake responses within 1…EPSS 0.21%7.5CVE-2023-28451Technitium dnsserver uncontrolled resource consumption vulnerabilityAn issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving software, which triggers a resolver to ignore…EPSS 0.53%6.5CVE-2026-42255Technitium dnsserver vulnerabilityTechnitium DNS Server before 15.0 allows DNS traffic amplification via cyclic name server delegation.EPSS 0.35%5.3CVE-2024-56946Technitium dnsserver vulnerabilityDenial of service in DNS-over-QUIC in Technitium DNS Server <= v13.2.2 allows remote attackers to permanently stop the server from accepting new DNS-…EPSS 0.45%

Source: NIST National Vulnerability Database (record CVE-2023-49203), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.