EUVD-2026-73720
GHSA-527h-q9f6-p7qx
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered heap overflow with no auth required but mandatory user interaction; full triad impact consistent with code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
AnalysisAI
Heap-based buffer overflow (CWE-122) in Microsoft .NET and Visual Studio allows a network-based unauthenticated attacker to achieve privilege escalation - and given the full C:H/I:H/A:H CVSS impact, effectively arbitrary code execution - on affected systems when a user interacts with attacker-controlled content. Affected are .NET 8.0 through 11.0 RC1 and Visual Studio 2022/2026 across multiple release trains. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a user with an affected version of Visual Studio (2022 17.14.x or 2026 18.9.x) or a .NET runtime (8.0.x, 9.0.x, 10.0.x, or 11.0.x pre-RC1) installed to open or process attacker-controlled content - such as a crafted project file, data file, or network resource - triggering the heap overflow (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) indicates a high-severity flaw that is network-reachable, low-complexity, unauthenticated, but requires user interaction. … 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 | Microsoft has released patches addressing CVE-2026-69439. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, complete an inventory of all systems running .NET versions 8.0 through 11.0 RC1 and Visual Studio 2022 or 2026 installations across development, build, and CI/CD infrastructure. …
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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