CVE-2026-69522: CWE-122: Heap-based Buffer Overflow in Microsoft .NET 10.0
Description
CVE-2026-69522 is a heap-based buffer overflow vulnerability in Microsoft .NET 10.0 and several other versions. It allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity score of 8.8 and affects multiple versions across .NET 3.0.0.0 through 18.9.3. An official fix is available from Microsoft.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
.NET 10.0
Microsoft
.NET 11.0
Microsoft
.NET 8.0
Microsoft
.NET 9.0
Microsoft
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
Microsoft
Microsoft .NET Framework 3.5 AND 4.7.2
Microsoft
Microsoft .NET Framework 3.5 AND 4.8
Microsoft
Microsoft .NET Framework 3.5 AND 4.8.1
Microsoft
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
Microsoft
Microsoft .NET Framework 4.8
Microsoft
Microsoft .NET Framework 4.8.1
Microsoft
Microsoft Visual Studio 2022 version 17.14
Microsoft
Microsoft Visual Studio 2026 version 18.9
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-69522 and classified under CWE-122 (heap-based buffer overflow), affects Microsoft .NET versions including 3.0.0.0, 4.7.x, 4.8.x, 8.0.x, 9.0.x, 10.0.x, 11.0.0, 17.14.x, and 18.9.x. It allows an unauthorized attacker to execute arbitrary code remotely by exploiting a heap-based buffer overflow in Visual Studio components related to .NET. The CVSS v3.1 base score is 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix for this vulnerability.
Potential Impact
Successful exploitation of this heap-based buffer overflow can lead to remote code execution without requiring privileges, potentially allowing attackers to fully compromise affected systems. The vulnerability impacts confidentiality, integrity, and availability of the affected software. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patches as detailed in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T21:09:40.782Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69522","vendor":"Microsoft"}]
Threat ID: 6aa04505acd9273b49fa819d
Added to database: 09/08/2026, 17:25:25 UTC
Last enriched: 10/16/2026, 21:18:51 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 52
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