Multiple vulnerabilities in Microsoft Windows (July 17, 2026)

unknownCVE-2026-58643 CVE-2026-58598 CVE-2026-56171 CVE-2026-59117

Multiple vulnerabilities have been discovered in Microsoft Windows. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation, and data confidentiality breaches.

CSIRTS triage

vendor: Microsoft product: Windows Remote code execution Privilege escalation Information disclosure

What: Multiple vulnerabilities allow an attacker to cause remote arbitrary code execution, privilege escalation, and data confidentiality breaches.
Who is affected: Users of Microsoft Windows are affected.
Urgency: Remediation is urgent due to the potential for remote code execution and privilege escalation.
Action: Apply the latest security updates for Microsoft Windows.

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

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-17
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0895/

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-2026-586430.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all scored CVEs.
Low exploitation riskCVE-2026-585980.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.
Low exploitation riskCVE-2026-561710.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all scored CVEs.
Low exploitation riskCVE-2026-591170.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58643	coverage & exploitation status	NVD · CVE.org
CVE-2026-58598	coverage & exploitation status	NVD · CVE.org
CVE-2026-56171	coverage & exploitation status	NVD · CVE.org
CVE-2026-59117	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Microsoft Windows

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.

critical[NEW] [critical] Microsoft Windows products: Multiple vulnerabilitiescert-bund · 2026-07-27
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