[UPDATE] [high] Unbound: Multiple vulnerabilities

CSIRTS triage

What

Multiple vulnerabilities allow an attacker to cause a denial of service state, potentially execute code, and cause unspecified impacts.

Who is affected

Deployments of Unbound are affected by these vulnerabilities.

Urgency

Remediation is urgent due to the high severity of the vulnerabilities, although they have not been exploited yet.

Action

Update Unbound to the latest version to mitigate these vulnerabilities.

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

Details

Source

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

Severity

high

Published

2026-08-25

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-2026-1599

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.

• Moderate exploitation riskCVE-2026-332781.3% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 67% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-327920.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-406220.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-412920.72% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-425340.58% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 45% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-429230.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-429440.84% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 55% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-429590.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-429600.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2026-443900.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• high[NEW] [high] Oracle Solaris third-party components: Multiple vulnerabilitiescert-bund
• unknownF5 Products Denial of Service Vulnerabilityhkcert
• unknownMultiple vulnerabilities in IBM products (August 07, 2026)cert-fr-avis

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