CVE-2026-77906: Visual Studio Remote Code Execution Vulnerability

highCVSS 8.8CVE-2026-77906

Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: high — CVSS 8.8
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77906

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-2026-779060.77% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-77906	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 Visual Studio 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.

highGHSA-2j8r-3c22-8565: Microsoft Security Advisory CVE-2026-69522 – .NET and Visual Studio Remote Code Execution…ghsa · 2026-09-09
highGHSA-63gh-g2x5-x69v: Microsoft Security Advisory CVE-2026-71328 – .NET and Visual Studio Remote Code Execution…ghsa · 2026-09-09
highGHSA-4qhr-qf46-fcrx: Duplicate Advisory: Microsoft Security Advisory CVE-2026-71328 – .NET and Visual Studio R…ghsa · 2026-09-08
highGHSA-q72m-f2r4-w4cw: Duplicate Advisory: Microsoft Security Advisory CVE-2026-69522 – .NET and Visual Studio R…ghsa · 2026-09-08
highCVE-2026-69522: .NET and Visual Studio Remote Code Execution Vulnerabilitymsrc · 2026-09-08
highCVE-2026-77907: Visual Studio Remote Code Execution Vulnerabilitymsrc · 2026-09-08