# CVE-2026-45557

## Summary

- **CVE ID:** CVE-2026-45557
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (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)
- **CWE:** CWE-405, CWE-406, CWE-770
- **Published:** May 19, 2026
- **Last Modified:** May 19, 2026

## 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.

## Affected Products

- Technitium — DNS Server (0)
- Technitium — DNS Server (15.0)

## References

- [CNA](https://github.com/TechnitiumSoftware/DnsServer/blo/master/CHANGELOG.md#version-150)
- [CNA](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-26-138-02.json)
- [CNA](https://www.cve.org/CVERecord?id=CVE-2026-45557)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._