Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-69439

Severity CVSS v4.0:
Pending analysis
Type:
CWE-122 Heap-based Buffer Overflow
Publication date:
08/09/2026
Last modified:
29/09/2026

Description

Heap-based buffer overflow in .NET and Visual Studio allows an unauthorized attacker to elevate privileges over a network.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* 8.0.0 (including) 8.0.31 (excluding)
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* 9.0.0 (including) 9.0.20 (excluding)
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* 10.0.0 (including) 10.0.12 (excluding)
cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:*
cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* 17.14.0 (including) 17.14.40 (excluding)
cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:* 18.9.0 (including) 18.9.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools