CVE-2026-32178 — .NET Spoofing Vulnerability

Executive Summary

Improper neutralization of special elements in .NET allows an unauthorized attacker to perform spoofing over a network.

Overview

7.5

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Spoofing

Released Apr 14 2026

Last Updated Apr 14 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.0111 — 0.61625 percentile

NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

None

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.5

EPSS Score

0.0111

probability of exploitation in the next 30 days

0.61625 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

12 affected products

Product	KB Article	Severity	Impact	Restart Required
.NET 10.0 installed on Linux	`5086095 (Security Update)`	Important	Spoofing	Maybe
.NET 10.0 installed on Mac OS	`5086095 (Security Update)`	Important	Spoofing	Maybe
.NET 10.0 installed on Windows	`5086095 (Security Update)`	Important	Spoofing	Maybe
.NET 8.0	`5086096 (Security Update)`	Important	Spoofing	Maybe
.NET 8.0 installed on Linux	`5086096 (Security Update)`	Important	Spoofing	Maybe
.NET 8.0 installed on Mac OS	`5086096 (Security Update)`	Important	Spoofing	Maybe
.NET 8.0 installed on Windows	`5086096 (Security Update)`	Important	Spoofing	Maybe
.NET 9.0 installed on Linux	`5086097 (Security Update)`	Important	Spoofing	Maybe
.NET 9.0 installed on Mac OS	`5086097 (Security Update)`	Important	Spoofing	Maybe
.NET 9.0 installed on Windows	`5086097 (Security Update)`	Important	Spoofing	Maybe
Microsoft Visual Studio 2022 version 17.12	`Release Notes (Security Update)`	Important	Spoofing	Maybe
Microsoft Visual Studio 2022 version 17.14	`Release Notes (Security Update)`	Important	Spoofing	Maybe

Patches

4 patches

Article	Type	Restart
`5086095`	Security Update	Maybe
`5086096`	Security Update	Maybe
`5086097`	Security Update	Maybe
`Release Notes`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Ludvig Pedersen

References

MSRC Advisory MITRE NVD