[UPDATE] [medium] DNSdist: Multiple vulnerabilities allow denial of service

CSIRTS triage

What

Multiple vulnerabilities allow an attacker to carry out a denial of service attack.

Who is affected

Deployments of DNSdist.

Urgency

Remediation is medium urgency as it can lead to service disruption.

Action

Update to the latest version of DNSdist.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-07-02

Exploitation

Not in CISA KEV at last sync

Language

Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1230

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

• Low exploitation riskCVE-2026-332540.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.
• Low exploitation riskCVE-2026-332570.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.
• Low exploitation riskCVE-2026-332600.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
• Low exploitation riskCVE-2026-335930.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all scored CVEs.
• Low exploitation riskCVE-2026-335940.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.
• Low exploitation riskCVE-2026-335950.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all scored CVEs.
• Low exploitation riskCVE-2026-335960.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.
• Low exploitation riskCVE-2026-335970.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all scored CVEs.
• Moderate exploitation riskCVE-2026-335981.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 61% of all scored CVEs.
• Low exploitation riskCVE-2026-335990.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

• medium[UPDATE] [medium] PowerDNS: Multiple vulnerabilitiescert-bund

Recent advisories for DNSdist

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

• unknownDSA-6367-1 dnsdist - security updatedebian · 2026-06-25

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