CVE-2026-70197: .NET and Visual Studio Remote Code Execution Vulnerability
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-01 19:19 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
Out-of-bounds write in .NET allows an unauthorized attacker to execute code over a network.
Description quoted from the CVE record (assigned by microsoft, published 2026-10-13).
Weakness: CWE-787: Out-of-bounds Write
How it can be exploited
Exploitable over the network with high attack complexity needing no privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. 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
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer evidence for this CVE has not been fetched yet.
Live scores
- EPSS
- 0.008
low predicted chance of attack - VEDAS
- 0.048
little exploit evidence - On CISA KEV
- Not listed
- Detection rule
- None yet
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| Microsoft .NET 10.0 installed on Linux | from 10.0.0 before 10.0.403 | Not stated |
| Microsoft .NET 10.0 installed on Mac OS | from 10.0.0 before 10.0.403 | Not stated |
| Microsoft .NET 10.0 installed on Windows | from 10.0.0 before 10.0.403 | Not stated |
| Microsoft .NET 10.0 runtime | from 10.0.0 before 10.0.13 | Not stated |
| Microsoft .NET 11.0 installed on Linux | from 11.0.0-preview.1 before 11.0.100-rc.3 | Not stated |
| Microsoft .NET 11.0 installed on Mac OS | from 11.0.0-preview.1 before 11.0.100-rc.3 | Not stated |
| Microsoft .NET 11.0 installed on Windows | from 11.0.0-preview.1 before 11.0.100-rc.3.26522.148 | Not stated |
| Microsoft .NET 11.0 runtime | from 11.0.0 before 11.0.0-rc.2 | Not stated |
| Microsoft .NET 8.0 installed on Linux | from 8.0.0 before 8.0.427 | Not stated |
| Microsoft .NET 8.0 installed on Mac OS | from 8.0.0 before 8.0.427 | Not stated |
| Microsoft .NET 8.0 installed on Windows | from 8.0.0 before 8.0.427 | Not stated |
| Microsoft .NET 8.0 runtime | from 8.0.0 before 8.0.32 | Not stated |
| Microsoft .NET 9.0 installed on Linux | from 9.0.0 before 9.0.320 | Not stated |
| Microsoft .NET 9.0 installed on Mac OS | from 9.0.0 before 9.0.320 | Not stated |
| Microsoft .NET 9.0 installed on Windows | from 9.0.0 before 9.0.320 | Not stated |
| Microsoft .NET 9.0 runtime | from 9.0.0 before 9.0.21 | Not stated |
| Microsoft Microsoft Visual Studio 2019 version 16.11 | from 16.11.0 before 16.11.61 | Not stated |
| Microsoft Microsoft Visual Studio 2022 version 17.14 | from 17.14.0 before 17.14.43 | Not stated |
| Microsoft Microsoft Visual Studio 2026 version 18.10 | from 18.10.0 before 18.10.4 | Not stated |
| Microsoft Microsoft Visual Studio 2026 version 18.11 | from 18.11.0 before 18.11.2 | Not stated |
1 more products are listed in the CVE record.
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Fixed versions stated in the CVE record: 10.0.403, 10.0.13, 11.0.100-rc.3, 11.0.100-rc.3.26522.148, 11.0.0-rc.2, 8.0.427, 8.0.32, 9.0.320, 9.0.21, 16.11.61, 17.14.43, 18.10.4 and others.
Vendor guidance:
- .NET and Visual Studio Remote Code Execution Vulnerability (vendor-advisory, patch)
How to detect it
There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.
Advisories on this CVE
- .NET out-of-band update (CVE-2026-70197, CVE-2026-102870, CVE-2026-114148): the 13 October fixes were incomplete (full advisory)
- .NET: out-of-band update re-fixes October flaws and a tarball privilege bug (CVE-2026-114148, CVE-2026-70197, CVE-2026-102870) (25 Oct 2026)
References
Vendor advisories and patches
- .NET and Visual Studio Remote Code Execution Vulnerability (vendor-advisory, patch)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS). Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.