CVE-2026-32175 — .NET Core Tampering Vulnerability

Executive Summary

A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles files.

Overview

4.3

CVSS MEDIUM

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Tampering

Released May 12 2026

Last Updated May 12 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00711 — 0.48687 percentile

NVD CVSS 4.3 MEDIUM — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

None

INTEGRITY

Low

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 3.8

EPSS Score

0.00711

probability of exploitation in the next 30 days

0.48687 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

6 affected products

Product	KB Article	Severity	Impact	Restart Required
.NET 10.0 installed on Windows	`5093446 (Security Update)`	Important	Tampering	Maybe
.NET 8.0 installed on Windows	`5093447 (Security Update)`	Important	Tampering	Maybe
.NET 9.0 installed on Windows	`5093448 (Security Update)`	Important	Tampering	Maybe
Microsoft Visual Studio 2022 version 17.12	`Release Notes (Security Update)`	Important	Tampering	Maybe
Microsoft Visual Studio 2022 version 17.14	`Release Notes (Security Update)`	Important	Tampering	Maybe
Microsoft Visual Studio 2026 version 18.5	`Release Notes (Security Update)`	Important	Tampering	Maybe

Patches

4 patches

Article	Type	Restart
`5093446`	Security Update	Maybe
`5093447`	Security Update	Maybe
`5093448`	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

Anonymous, Radek Zikmund with Microsoft s.r.o.

References

MSRC Advisory MITRE NVD