[UPDATE] [high] Microsoft Windows: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in various versions of Microsoft Windows and Microsoft Windows Server to gain administrative rights, execute arbitrary code, bypass security measures, manipulate and disclose data, or conduct spoofing attacks.
CSIRTS triage
- What
- Multiple vulnerabilities can be exploited to gain administrative rights and execute arbitrary code.
- Who is affected
- Various versions of Microsoft Windows and Windows Server are affected.
- Urgency
- Remediation is urgent due to the high severity and potential for significant impact.
- Action
- Install the latest security updates for Microsoft Windows.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1849
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.
- Elevated exploitation riskCVE-2026-4729122.8% 30-day exploitation probability — well above the norm. Schedule remediation this cycle. Riskier than 97% of all scored CVEs.
- Low exploitation riskCVE-2025-102630.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all scored CVEs.
- Low exploitation riskCVE-2026-338280.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all scored CVEs.
- Low exploitation riskCVE-2026-343350.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.
- Low exploitation riskCVE-2026-404040.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all scored CVEs.
- Low exploitation riskCVE-2026-404090.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
- Low exploitation riskCVE-2026-410920.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
- Low exploitation riskCVE-2026-411080.27% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.
- Low exploitation riskCVE-2026-428280.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.
- Low exploitation riskCVE-2026-428290.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
Referenced CVEs
+12 more CVEs referenced in this advisory.
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[UPDATE] [medium] Xen: Multiple vulnerabilitiescert-bund
- unknownMultiples vulnérabilités dans le noyau Linux de Red Hat (31 juillet 2026)cert-fr-avis
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- high[UPDATE] [high] AMD ARM and EPYC processors: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 10, 2026)cert-fr-avis
- unknownDebian Linux Kernel Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 3, 2026)cert-fr-avis
- unknownSUSE Linux Kernel Multiple Vulnerabilitieshkcert
- unknownRedHat Linux Kernel Multiple Vulnerabilitieshkcert
- highCVE-2026-42911: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerabilitymsrc
- mediumCVE-2026-42903: Windows Kerberos Denial of Service Vulnerabilitymsrc
- highCVE-2026-42916: NT OS Kernel Elevation of Privilege Vulnerabilitymsrc
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
- medium[NEW] [medium] Microsoft Windows: Multiple Vulnerabilitiescert-bund · 2026-07-20
- medium[NEW] [medium] Microsoft Windows Terminal: Vulnerability allows code executioncert-bund · 2026-07-17
- medium[NEW] [medium] Microsoft Windows Admin Center: Vulnerability allows Cross-Site Scriptingcert-bund · 2026-07-17
- unknownMultiple vulnerabilities in Microsoft Windows (July 17, 2026)cert-fr-avis · 2026-07-17
- high[NEW] [high] Microsoft Windows Terminal and 365 Copilot: Multiple Vulnerabilitiescert-bund · 2026-07-15
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