{"uuid": "91263ec2-6975-4dbe-ab0a-de5f1ae4a180", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-62871", "type": "seen", "source": "https://gist.github.com/alon710/5016d0efcb653d018ab1eaff732b8582", "content": "# CVE-2026-62871: CVE-2026-62871: Local Code Execution and Elevation of Privilege in .NET and Visual Studio\n\n> **CVSS Score:** 7.8\n> **Published:** 2026-08-11\n> **Full Report:** https://cvereports.com/reports/CVE-2026-62871\n\n## Summary\nCVE-2026-62871 is a high-severity local code execution and elevation of privilege vulnerability in Microsoft .NET and Microsoft Visual Studio. It arises from an out-of-bounds write (heap-based buffer overflow) in the runtime environment during native interoperability or unmanaged pointer manipulation, requiring user interaction to execute arbitrary instructions.\n\n## TL;DR\nAn out-of-bounds write in Microsoft .NET and Visual Studio allows local attackers to execute arbitrary code via malformed payloads, requiring user interaction.\n\n## Technical Details\n\n- **CWE ID**: CWE-787 / CWE-122\n- **Attack Vector**: Local\n- **CVSS v3.1**: 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)\n- **Impact**: Elevation of Privilege / Arbitrary Code Execution\n- **Exploit Status**: None (Theoretical)\n- **KEV Status**: Not Listed\n\n## Affected Systems\n\n- Microsoft .NET 8.0\n- Microsoft .NET 9.0\n- Microsoft .NET 10.0\n- Microsoft Visual Studio 2022\n- Microsoft Visual Studio 2026\n\n## Mitigation\n\n- Deploy official Microsoft cumulative updates for .NET and Visual Studio.\n- Enforce execution policies to prevent unprivileged users from executing untrusted binaries.\n- Implement strong application whitelisting and software restriction policies.\n\n**Remediation Steps:**\n1. Identify vulnerable runtimes on system hosts by executing 'dotnet --list-runtimes' via the command line.\n2. Update .NET 8.0 to version 8.0.30 or higher, .NET 9.0 to 9.0.19 or higher, and .NET 10.0 to 10.0.11 or higher.\n3. Update Visual Studio 2022 (v17.14) to version 17.14.38 or later, and Visual Studio 2026 (v18.8) to version 18.8.3 or later.\n\n## References\n\n- [Official MSRC Security Advisory](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62871)\n- [Official CVE Record (CVE.org)](https://www.cve.org/CVERecord?id=CVE-2026-62871)\n- [National Vulnerability Database (NVD) Entry](https://nvd.nist.gov/vuln/detail/CVE-2026-62871)\n- [MITRE ATT&CK Search Page](https://attack.mitre.org/search/?search=CVE-2026-62871)\n- [CISA Known Exploited Vulnerabilities (KEV) Catalog](https://www.cisa.gov/known-exploited-vulnerabilities-catalog)\n- [EU Vulnerability Database (EUVD) Portal](https://euvd.enisa.europa.eu/)\n- [Shodan CVEDB Entry](https://www.shodan.io/search?query=CVE-2026-62871)\n- [Nuclei Templates Repository Search](https://github.com/projectdiscovery/nuclei-templates/search?q=CVE-2026-62871)\n- [PacketStorm Security Search Page](https://packetstormsecurity.com/search/?q=CVE-2026-62871)\n- [ExploitDB / Shodan CVEDB Reference](https://cvedb.shodan.io/cve/CVE-2026-62871)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-62871) - Automated Vulnerability Intelligence*", "creation_timestamp": "2026-08-11T21:32:34.450065Z"}