[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 98% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2025-102630.57% 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-2026-338280.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-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 15% of all EPSS-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 27% of all EPSS-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 EPSS-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 22% of all EPSS-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 EPSS-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 26% of all EPSS-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 22% of all EPSS-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] Linux Kernel: Multiple vulnerabilitiescert-bund
- highexploited[NEW] [high] IBM QRadar SIEM: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Red Hat Linux kernel (August 14, 2026)cert-fr-avis
- medium[UPDATE] [medium] Xen: Multiple vulnerabilitiescert-bund
- unknownDSA-6424-1 xen - security updatedebian
- high[UPDATE] [high] AMD ARM and EPYC processors: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Red Hat Linux kernel (August 07, 2026)cert-fr-avis
- unknownRedHat Linux Kernel Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Red Hat Linux kernel (July 31, 2026)cert-fr-avis
- 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
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 · 2026-09-02
- criticalexploited[UPDATE] [critical] Microsoft Windows: Multiple Vulnerabilitiescert-bund · 2026-08-28
- medium[NEW] [medium] Microsoft Windows Services: Multiple Vulnerabilitiescert-bund · 2026-08-21
- unknownMultiple vulnerabilities in Microsoft Windows (20 August 2026)cert-fr-avis · 2026-08-20
- critical[NEW] [critical] Microsoft Windows products: Multiple vulnerabilitiescert-bund · 2026-08-18
- medium[NEW] [medium] Microsoft Windows Package Manager: Vulnerability enables Privilege Escalationcert-bund · 2026-08-12
More from CERT-Bund (BSI) Security Advisories
- medium[NEW] [medium] Langflow: Multiple vulnerabilities2026-09-04
- medium[NEW] [medium] Grafana Enterprise: Multiple vulnerabilities allow gaining user or administrator privileges2026-09-04
- low[NEW] [low] Checkmk: Vulnerability allows Denial of Service2026-09-04
- low[NEW] [low] ImageMagick: Multiple vulnerabilities allow Denial of Service2026-09-04
- critical[NEW] [critical] vm2: Multiple vulnerabilities allow code execution2026-09-04