CVE-2026-11605: Unnecessary validation of DNSSEC signed records

CSIRTS triage

What

Unnecessary validation of DNSSEC signed records can lead to vulnerabilities.

Who is affected

Deployments using DNSSEC are affected.

Urgency

Remediation is urgent due to the high severity of the vulnerability.

Action

Review and adjust DNSSEC validation processes.

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

Details

Source

Microsoft Security Response Center (INTL · vendor-psirt · site)

Severity

high — CVSS 7.5

Published

2026-07-14

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-11605

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-2026-116050.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[NEW] [high] Internet Systems Consortium BIND: Multiple vulnerabilitiescert-bund
• highCVE-2026-11605: The issue is a resource exhaustion vulnerability associated with DNSSEC validation. BIND alway…nvd
• unknownDSA-6395-1 bind9 - security updatedebian

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