CVE-2026-69910: Windows Hyper-V Remote Code Execution Vulnerability

criticalCVSS 9.8CVE-2026-69910

Stack-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code over a network.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69910

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-2026-699101.00% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 61% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-69910	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedNCSC-2026-0353 [1.01] [M/H] Kwetsbaarheden verholpen in Microsoft Windowsncsc-nl
unknownNCSC-2026-0353 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft Windowsncsc-nl
criticalCVE-2026-69910: Stack-based buffer overflow in Windows Hyper-V allows an unauthorized attacker to execute code…nvd

Recent advisories for Windows Hyper-V Remote

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.

highCVE-2026-69603: Windows Hyper-V Remote Code Execution Vulnerabilitymsrc · 2026-09-08
highCVE-2026-80083: Windows Hyper-V Remote Code Execution Vulnerabilitymsrc · 2026-09-08
highCVE-2026-45641: Windows Hyper-V Remote Code Execution Vulnerabilitymsrc · 2026-06-09
highCVE-2026-47652: Windows Hyper-V Remote Code Execution Vulnerabilitymsrc · 2026-06-09
highCVE-2026-45607: Windows Hyper-V Remote Code Execution Vulnerabilitymsrc · 2026-06-09