CVE-2023-49203

HIGHNVD 7.57.5—

7.5

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 v3: 7.5
EG Score: 7.5(medium)
EPSS: 72.2%
KEV: Not listed

Published

September 18, 2024

Last Modified

July 10, 2025

References (2)

cve@mitrehttps://gist.github.com/idealeer/89947ca07836fd0f7e9761198ca9a0f3.
cve@mitrehttps://technitium.com/dns/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-406

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-23 21:53 UTCEG score recompute
2026-05-23 21:53 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-49203?

CVE-2023-49203 is a high vulnerability published on September 18, 2024. 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.

When was CVE-2023-49203 disclosed?

CVE-2023-49203 was first published in the National Vulnerability Database on September 18, 2024, with the most recent update on July 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-49203 actively exploited?

CVE-2023-49203 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-49203?

CVE-2023-49203 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-49203?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49203, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2023-49203

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CVE-2023-49203

📅 Published

🔄 Last Modified

🔗 References (2)