CVE-2026-71328: CWE-122: Heap-based Buffer Overflow in Microsoft .NET 10.0
Description
CVE-2026-71328 is a heap-based buffer overflow vulnerability in Microsoft .NET 10.0 and other specified 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 version ranges of .NET. 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 Visual Studio 2022 version 17.14
Microsoft
Microsoft Visual Studio 2026 version 18.9
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-122) involves a heap-based buffer overflow in Microsoft .NET, specifically impacting Visual Studio components. It enables remote code execution by an unauthorized attacker over a network. The affected versions include multiple ranges across .NET 8.0, 9.0, 10.0, 11.0.0, 17.14.x, and 18.9.x. The CVSS v3.1 base score is 8.8, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. Microsoft has issued an official fix for this vulnerability.
Potential Impact
Successful exploitation allows an attacker to execute arbitrary code remotely without privileges, potentially leading to full system compromise. The vulnerability impacts confidentiality, integrity, and availability of affected systems.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71328. No additional mitigations are specified or required beyond applying the official patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-05T18:41:50.333Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71328","vendor":"Microsoft"}]
Threat ID: 6aa0453eacd9273b49fa9c09
Added to database: 09/08/2026, 17:26:22 UTC
Last enriched: 10/17/2026, 20:40:41 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 46
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.