[UPDATE] [medium] dnsmasq: Vulnerability allows denial of service

mediumCVE-2026-6507

A remote, anonymous attacker can exploit a vulnerability in dnsmasq to conduct a denial of service attack.

CSIRTS triage

vendor: dnsmasq product: dnsmasq Denial of service

What: A vulnerability allows a remote, anonymous attacker to conduct a denial of service attack.
Who is affected: Deployments of dnsmasq are affected.
Urgency: Remediation is medium urgency as it can lead to service disruption.
Action: Update dnsmasq to the latest version to address this vulnerability.

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

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-07
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-2026-1167

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-2026-65070.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-6507	coverage & exploitation status	NVD · CVE.org

Recent advisories for dnsmasq

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.

medium[UPDATE] [medium] dnsmasq: Vulnerability allows Denial of Servicecert-bund · 2026-07-07
high[UPDATE] [high] dnsmasq: Multiple vulnerabilitiescert-bund · 2026-07-07
mediumCVE-2026-12969: Dnsmasq: dnsmasq: out-of-bounds read in find_soa() due to missing extrabytes validationmsrc · 2026-06-09
mediumCVE-2026-12725: Dnsmasq: dnsmasq: heap buffer overflow in log_query() when logging unsupported ds/dnskey repli…msrc · 2026-06-09