CVE-2026-32177

.NET Elevation of Privilege Vulnerability

State: Published
Severity: 7.3 High
Published: May 12, 2026
Updated: Aug 10, 2026
Reserved: Mar 11, 2026

Description

Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C	microsoft
3.1	7.3 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L	redhat-SADP

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-20 Improper Input Validation

Affected Products

Product	Versions
.NET 10.0Microsoft	10.0.0 to before 10.0.8Affected
.NET 8.0Microsoft	8.0.0 to before 8.0.27Affected
.NET 9.0Microsoft	9.0.0 to before 9.0.16Affected
Microsoft .NET Framework 3.5Microsoft	3.5.0 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft .NET Framework 3.5 AND 4.7.2Microsoft	4.7.0 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft .NET Framework 3.5 AND 4.8Microsoft	4.8.0 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft .NET Framework 3.5 AND 4.8.1Microsoft	4.8.1 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft	4.7.0 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft .NET Framework 4.8Microsoft	4.8.0 to before 4.8.9334.0 and 4.8.4802.0Affected
Microsoft Visual Studio 2022 version 17.12Microsoft	17.12.0 to before 17.12.20Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.32Affected
Microsoft Visual Studio 2026 version 18.5Microsoft	18.5.0 to before 18.5.3Affected

References

.NET Elevation of Privilege Vulnerabilityvendor-advisorypatch
https://access.redhat.com/security/cve/CVE-2026-32177vdb-entry
RHBZ#2476664issue-tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32177.json

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