CVE-2026-70197.NET and Visual Studio Remote Code Execution Vulnerability
- 8.1HighCVSS base score
- 0.79%Exploitation in 30 daysEPSS · top 43% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
Timeline
ID reserved
By microsoft
- 2 months later
· 2 months later
Published
- 28 days later
· 28 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Awaiting Analysis | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.79% · top 43% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
Microsoft · .NET 10.0 installed on Linux
- affected 10.0.0 – < 10.0.403
Microsoft · .NET 10.0 installed on Mac OS
- affected 10.0.0 – < 10.0.403
Microsoft · .NET 10.0 installed on Windows
- affected 10.0.0 – < 10.0.403
- affected 10.0.0 – < 10.0.13
Microsoft · .NET 11.0 installed on Linux
- affected 11.0.0-preview.1 – < 11.0.100-rc.3
Microsoft · .NET 11.0 installed on Mac OS
- affected 11.0.0-preview.1 – < 11.0.100-rc.3
Microsoft · .NET 11.0 installed on Windows
- affected 11.0.0-preview.1 – < 11.0.100-rc.3.26522.148
- affected 11.0.0 – < 11.0.0-rc.2
Microsoft · .NET 8.0 installed on Linux
- affected 8.0.0 – < 8.0.427
Microsoft · .NET 8.0 installed on Mac OS
- affected 8.0.0 – < 8.0.427
Microsoft · .NET 8.0 installed on Windows
- affected 8.0.0 – < 8.0.427
- affected 8.0.0 – < 8.0.32
Microsoft · .NET 9.0 installed on Linux
- affected 9.0.0 – < 9.0.320
Microsoft · .NET 9.0 installed on Mac OS
- affected 9.0.0 – < 9.0.320
Microsoft · .NET 9.0 installed on Windows
- affected 9.0.0 – < 9.0.320
- affected 9.0.0 – < 9.0.21
Microsoft · Microsoft Visual Studio 2019 version 16.11
- affected 16.11.0 – < 16.11.61
Microsoft · Microsoft Visual Studio 2022 version 17.14
- affected 17.14.0 – < 17.14.43
Microsoft · Microsoft Visual Studio 2026 version 18.10
- affected 18.10.0 – < 18.10.4
Microsoft · Microsoft Visual Studio 2026 version 18.11
- affected 18.11.0 – < 18.11.2
Microsoft · Microsoft Visual Studio 2026 version 18.12
- affected 18.12.0 – < 18.12 Insiders 3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.NETCore.App.Runtime.win-arm64GHSA-4mpw-cpwj-hxxj (opens in a new tab)
- NuGetMicrosoft.NETCore.App.Runtime.win-x64GHSA-4mpw-cpwj-hxxj (opens in a new tab)
- NuGetMicrosoft.NETCore.App.Runtime.win-x86GHSA-4mpw-cpwj-hxxj (opens in a new tab)
References
References1
- .NET and Visual Studio Remote Code Execution Vulnerability (opens in a new tab)vendor-advisorypatch
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-99701 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4mpw-cpwj-hxxj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-70197)Record last updated .