High severity · published Jul 14, 2026
CVE-2026-47300
ASP.NET Core Elevation of Privilege Vulnerability
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N1
.NET 10.0 · Microsoft
10.0.0 before 10.0.10 · source: vendor
N8
.NET 8.0 · Microsoft
8.0.0 before 8.0.29 · source: vendor
N9
.NET 9.0 · Microsoft
9.0.0 before 9.0.18 · source: vendor
MV
Microsoft Visual Studio 2022 version 17.12 · Microsoft
17.12.0 before 17.12.22 · source: vendor
MV
Microsoft Visual Studio 2022 version 17.14 · Microsoft
17.14.0 before 17.14.36 · source: vendor
MV
Microsoft Visual Studio 2026 version 18.7 · Microsoft
18.0 before 18.7.4 · source: vendor
NE
.net · Microsoft
8.0.0 before 8.0.29; 9.0.0 before 9.0.18; 10.0.0 before 10.0.6 · source: NVD
VS
Visual Studio 2022 · Microsoft
17.12.0 before 17.12.22; 17.14.0 before 17.14.36 · source: NVD
VS
Visual Studio 2026 · Microsoft
18.7.0 before 18.7.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47300
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47300
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47300
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