High severity · published Oct 13, 2026
CVE-2026-70179
ASP.NET Core Elevation of Privilege Vulnerability
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MV
Microsoft Visual Studio 2022 version 17.14 · Microsoft
17.14.0 before 17.14.42 · source: vendor
MV
Microsoft Visual Studio 2026 version 18.10 · Microsoft
18.10.0 before 18.10.4 · source: vendor
MI
Microsoft.AspNetCore.Authentication.Negotiate · Microsoft
10.0.0 before 10.0.13 · source: vendor
Affected product
MV
Microsoft Visual Studio 2022 version 17.14
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-70179
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-70179
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70179
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