EUVD-2026-73781
GHSA-4qhr-qf46-fcrx
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network delivery requiring no privileges, low complexity once content is crafted, but active victim interaction to open content; full C/I/A loss on successful exploitation.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft Visual Studio 2022 and 2026 enables network-delivered remote code execution when a victim user interacts with attacker-supplied content, yielding full compromise of confidentiality, integrity, and availability. The vulnerability spans multiple .NET Long-Term Support and current release trains (8.0, 9.0, 10.0, 11.0), significantly broadening the attack surface beyond the IDE to include build servers and CI/CD pipelines ingesting .NET artifacts. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required: a victim must open or process attacker-controlled content - such as a project file, solution, build artifact, or NuGet package - using an unpatched version of Visual Studio 2022 (17.14.x before 17.14.40), Visual Studio 2026 (18.9.x before 18.9.3), or an affected .NET runtime or SDK (8.0.x before 8.0.31, 9.0.x before 9.0.20, 10.0.x before 10.0.12, or 11.0 pre-RC1). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects high severity but not fully automatable exploitation: no credentials are required and the network attack vector enables broad delivery, yet a victim must actively interact with the malicious content. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply vendor-released patches immediately: update Visual Studio 2026 to 18.9.3, Visual Studio 2022 to 17.14.40, .NET 8.0 to 8.0.31, .NET 9.0 to 9.0.20, .NET 10.0 to 10.0.12, and .NET 11.0 to RC1 or later as it becomes generally available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a comprehensive audit of all Visual Studio 2022 and 2026 installations and build server infrastructure to identify affected systems, prioritizing CI/CD environments and artifact processing systems. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today