.NET and Visual Studio Elevation of Privilege Vulnerability
Priority MEDIUM 42CWE-122Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Privilege escalation
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from Microsoft.
Summary
Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00819 57th percentileScored 2026-11-07
Fix Fixed .NET 10.0 runtime (Microsoft): 10.0.12.NET 11.0 runtime (Microsoft): 11.0 RC1+5 more products
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | .NET 10.0 runtime | 10.0.0 to before 10.0.12 | 10.0.12 | Patch available | CNA |
| Microsoft | .NET 11.0 runtime | 11.0.0 to before 11.0 RC1 | 11.0 RC1 | Patch available | CNA |
| Microsoft | .NET 8.0 runtime | 8.0.0 to before 8.0.31 | 8.0.31 | Patch available | CNA |
| Microsoft | .NET 9.0 runtime | 9.0.0 to before 9.0.20 | 9.0.20 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 to before 17.14.40 | 17.14.40 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2026 version 18.9 | 18.9.0 to before 18.9.3 | 18.9.3 | Patch available | CNA |
| — | Microsoft.DiaSymReader.Native (NuGet) | 17.10.0-beta1.24272.1 to before 18.9.0-beta1.26405.2 | 18.9.0-beta1.26405.2 | Patch available | GHSA-527h-q9f6-p7qx |
- .NET 10.0 runtime VendorMicrosoft Affected 10.0.0 to before 10.0.12 Fixed in 10.0.12 Patch available CNA
- .NET 11.0 runtime VendorMicrosoft Affected 11.0.0 to before 11.0 RC1 Fixed in 11.0 RC1 Patch available CNA
- .NET 8.0 runtime VendorMicrosoft Affected 8.0.0 to before 8.0.31 Fixed in 8.0.31 Patch available CNA
- .NET 9.0 runtime VendorMicrosoft Affected 9.0.0 to before 9.0.20 Fixed in 9.0.20 Patch available CNA
- Microsoft Visual Studio 2022 version 17.14 VendorMicrosoft Affected 17.14.0 to before 17.14.40 Fixed in 17.14.40 Patch available CNA
- Microsoft Visual Studio 2026 version 18.9 VendorMicrosoft Affected 18.9.0 to before 18.9.3 Fixed in 18.9.3 Patch available CNA
- Microsoft.DiaSymReader.Native (NuGet) Vendor— Affected 17.10.0-beta1.24272.1 to before 18.9.0-beta1.26405.2 Fixed in 18.9.0-beta1.26405.2 Patch available GHSA-527h-q9f6-p7qx
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* | 8.0.0 to before 8.0.31; 9.0.0 to before 9.0.20; 10.0.0 to before 10.0.12 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:* | 11.0.0 preview1 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:* | 11.0.0 preview2 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:* | 11.0.0 preview3 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:* | 11.0.0 preview4 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:* | 11.0.0 preview5 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:* | 11.0.0 preview6 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:* | 11.0.0 preview7 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* | 17.14.0 to before 17.14.40 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.31; 9.0.0 to before 9.0.20; 10.0.0 to before 10.0.12 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:* Versions 11.0.0 preview1 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:* Versions 11.0.0 preview2 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:* Versions 11.0.0 preview3 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:* Versions 11.0.0 preview4 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:* Versions 11.0.0 preview5 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:* Versions 11.0.0 preview6 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:* Versions 11.0.0 preview7 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* Versions 17.14.0 to before 17.14.40 Vulnerable ·Microsoft
Remediation
- Fix · CNA .NET 10.0 runtime (Microsoft) Fixed in 10.0.12
- Fix · CNA .NET 11.0 runtime (Microsoft) Fixed in 11.0 RC1
- Fix · CNA .NET 8.0 runtime (Microsoft) Fixed in 8.0.31
- Fix · CNA .NET 9.0 runtime (Microsoft) Fixed in 9.0.20
- Fix · CNA Microsoft Visual Studio 2022 version 17.14 (Microsoft) Fixed in 17.14.40
- Fix · CNA Microsoft Visual Studio 2026 version 18.9 (Microsoft) Fixed in 18.9.3
- Fix · GHSA-527h-q9f6-p7qx Microsoft.DiaSymReader.Native (NuGet) Fixed in 18.9.0-beta1.26405.2 Advisory →
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Elevation of Privilege
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Unlikely
| Product | Status | Plan or fix |
|---|---|---|
| .NET 10.0 installed on Windows | Fixed | 10.0.12 · Security Update |
| .NET 11.0 installed on Windows | Fixed | 11.0 RC1 Security Update |
| .NET 8.0 installed on Windows | Fixed | 8.0.31 · Security Update |
| .NET 9.0 installed on Windows | Fixed | 9.0.20 · Security Update |
| Microsoft Visual Studio 2022 version 17.14 | Fixed | 17.14.40 · Security Update |
| Microsoft Visual Studio 2026 version 18.9 | Fixed | 18.9.3 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-69439
- 2026-10-03 Alias added: GHSA-527h-q9f6-p7qx
- 2026-10-30 Fix available: Microsoft/.NET 10.0 [email protected], Microsoft/.NET 11.0 [email protected] RC1, Microsoft/.NET 8.0 [email protected] +1 · CNA
References
More Microsoft .net vulnerabilities
- TI-2026-79288 Out-of-bounds write in Google Brotli decoder KEVCVSS 4.0CRITICAL 9.2
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
- TI-2023-19588 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2021-08380 .NET Core Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-69439 · CVE Program
- CVE-2026-69439 · NVD
- FIRST EPSS
- GHSA-527h-q9f6-p7qx · GitHub Advisory Database · CC BY 4.0
- CVE-2026-69439 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences