What is CVE-2023-49203?

CVE-2023-49203 is a high-severity vulnerability in Technitium Dnsserver, classified under CWE-406. CVSS score: 7.5/10. Published 2024-09-18.

How severe is CVE-2023-49203?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Technitium Dnsserver

CVE-2023-49203

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.

Published 2024-09-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.006 (50.1th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Technitium Dnsserver — versions 11.5.3

Weakness classification (CWE)

CWE-406

References

technitium.com/dns/ (Product)
gist.github.com/idealeer/89947ca07836fd0f7e9761198ca9a0f3. (Broken Link)

Frequently asked questions

What is CVE-2023-49203?: CVE-2023-49203 is a high-severity vulnerability in Technitium Dnsserver, classified under CWE-406. CVSS score: 7.5/10. Published 2024-09-18.
How severe is CVE-2023-49203?: High severity. CVSS v3 base score is 7.5 out of 10.