How severe is CVE-2026-45557?

CVE-2026-45557 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-45557 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-45557?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45557 have an EU (EUVD) identifier?

Yes. CVE-2026-45557 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30938.

When was CVE-2026-45557 published?

CVE-2026-45557 was published on 2026-05-19 and last updated on 2026-06-17.

CVE-2026-45557

CVE-2026-45557 is a medium-severity vulnerability with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-405.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
CVSS v4: 6.9
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30938
Weakness: CWE-405
Published: 2026-05-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-45557?: 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.
How severe is CVE-2026-45557?: CVE-2026-45557 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-45557 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-45557?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45557 have an EU (EUVD) identifier?: Yes. CVE-2026-45557 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30938.
When was CVE-2026-45557 published?: CVE-2026-45557 was published on 2026-05-19 and last updated on 2026-06-17.

References

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