Vulnerability details
CVE-2026-70179
Microsoft Visual StudioMicrosoft Microsoft.AspNetCore.Authentication.Negotiate
ASP.NET Core Elevation of Privilege Vulnerability
CVSS 3.1
7.5High
Official description
Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (microsoft) | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 | 17.14.0 ≤ v < 17.14.42 | CVEProject cvelistV5 (CNA) |
| Microsoft | Microsoft Visual Studio 2026 version 18.10 | 18.10.0 ≤ v < 18.10.4 | CVEProject cvelistV5 (CNA) |
| Microsoft | Microsoft.AspNetCore.Authentication.Negotiate | 10.0.0 ≤ v < 10.0.13 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70179 vendor-advisorypatch
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Details
- Published
- 2026-10-13
- Last updated
- 2026-10-31
- State
- Published
- Assigner (CNA)
- microsoft
Exploit prediction (EPSS)
0.62%
Probability of exploitation in 30 days
50.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-290Authentication Bypass by Spoofing