CVE-2026-46582: A wildcard replay, as another piece of data, triggers poisoning in the serve expired reply path

CSIRTS triage

What

A wildcard replay vulnerability can trigger poisoning in the serve expired reply path.

Who is affected

Deployments that utilize the affected DNS services are at risk.

Urgency

Remediation is low priority due to the low severity of the vulnerability.

Action

Monitor for updates and apply them when convenient.

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

Details

Source

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

Severity

low — CVSS 3.7

Published

2026-07-14

Exploitation

Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46582

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-2026-465820.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• medium[NEW] [medium] Unbound: Multiple vulnerabilitiescert-bund
• lowCVE-2026-46582: In NLnet Labs Unbound 1.6.0 up to and including 1.25.1, a replay of a wildcard rrset as anothe…nvd

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