Review reviewHigh

CVE-2026-32177

Microsoft .NET 10.0, .NET 8.0, .NET 9.0

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

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.55%

Technical severityCVSS 7.3

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

Product: Microsoft .NET 10.0, .NET 8.0, .NET 9.0
Affected versions: >= 10.0.0 < 10.0.8, >= 8.0.0 < 8.0.27, >= 9.0.0 < 9.0.16, >= 3.5.0 < 4.8.9334.0 and 4.8.4802.0, >= 4.7.0 < 4.8.9334.0 and 4.8.4802.0, >= 4.8.0 < 4.8.9334.0 and 4.8.4802.0, >= 4.8.1 < 4.8.9334.0 and 4.8.4802.0, >= 17.12.0 < 17.12.20, >= 17.14.0 < 17.14.32, >= 18.5.0 < 18.5.3, 4.8, 4.6.2, 4.7, 4.7.1, 4.7.2, 3.5, 4.8.1
Fixed versions: 17.12.20, 17.14.32, 18.5.3, 8.0.27, 9.0.16, 10.0.8

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft .NET 10.0, .NET 8.0, .NET 9.0 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.