High severity · published Aug 11, 2026
CVE-2026-62871
.NET Elevation of Privilege Vulnerability
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
.NET 8.0 · Microsoft
8.0.0 before 8.0.30 · source: vendor
N9
.NET 9.0 · Microsoft
9.0.0 before 9.0.19 · source: vendor
MV
Microsoft Visual Studio 2022 version 17.14 · Microsoft
17.14.0 before 17.14.38 · source: vendor
MV
Microsoft Visual Studio 2026 version 18.8 · Microsoft
18.0 before 18.8.3 · source: vendor
NE
.net · Microsoft
8.0.0 before 8.0.30; 9.0.0 before 9.0.19; 10.0.0 before 10.0.11 · source: NVD
VS
Visual Studio 2022 · Microsoft
17.14.0 before 17.14.38 · source: NVD
VS
Visual Studio 2026 · Microsoft
18.8.0 before 18.8.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-62871
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-62871
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62871
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