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High severity · published Sep 8, 2026
CVE-2026-69522
.NET and Visual Studio Remote Code Execution Vulnerability
8.8
CVSS
0.8%
EPSS
No
On KEV
Description
Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 58% 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 10.0.12 · source: vendor
N1
.NET 11.0 · Microsoft
11.0.0 before 11.0 RC1 · source: vendor
N8
.NET 8.0 · Microsoft
8.0.0 before 8.0.31 · source: vendor
N9
.NET 9.0 · Microsoft
9.0.0 before 9.0.20 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
3.0.0.0 before 2.0.50727.8984 & 3.0.30729.8980 & 4.7.4145.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.7.2 · Microsoft
4.7.0 before 2.0.50727.9070 & 3.0.30729.9068 & 4.7.4145.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8 · Microsoft
4.8.0 before 2.0.50727.9070 & 3.0.30729.9068 & 4.8.4806.0 · source: vendor
MN
Microsoft .NET Framework 3.5 AND 4.8.1 · Microsoft
4.8.1 before 2.0.50727.9183 & 3.0.30729.9169 & 4.8.9347.0 · source: vendor
MN
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 · Microsoft
4.7.0 before 4.7.4145.0 · source: vendor
MN
Microsoft .NET Framework 4.8 · Microsoft
4.8.0 before 4.8.4806.0 · source: vendor
MN
Microsoft .NET Framework 4.8.1 · Microsoft
4.8.0.0 before 4.8.9347.0 · source: vendor
MV
Microsoft Visual Studio 2022 version 17.14 · Microsoft
17.14.0 before 17.14.40 · source: vendor
Affected product
N1
.NET 10.0
Microsoft
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-69522
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-69522
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522
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