CVE-2026-57108 — .NET Denial of Service Vulnerability

Executive Summary

Access of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network.

Overview

7.5

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Denial of Service

Weakness CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

Released Jul 14 2026

Last Updated Jul 14 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.01105 — 0.62923 percentile

NVD CVSS 7.5 HIGH — matches MSRC

CVSS Vector

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

ATTACK VECTOR

Network

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

None

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

None

INTEGRITY

None

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.5

EPSS Score

0.01105

probability of exploitation in the next 30 days

0.62923 percentile - updated 2026-08-14

View on FIRST.org

Affected Products

8 affected products

Product	KB Article	Severity	Impact	Restart Required
.NET 10.0 installed on Linux	`5104034 (Security Update)`	Important	Denial of Service	Maybe
.NET 10.0 installed on Mac OS	`5104034 (Security Update)`	Important	Denial of Service	Maybe
.NET 8.0 installed on Linux	`5104032 (Security Update)`	Important	Denial of Service	Maybe
.NET 8.0 installed on Mac OS	`5104032 (Security Update)`	Important	Denial of Service	Maybe
.NET 8.0 installed on Windows	`5104032 (Security Update)`	Important	Denial of Service	Maybe
.NET 9.0 installed on Linux	`5104033 (Security Update)`	Important	Denial of Service	Maybe
.NET 9.0 installed on Mac OS	`5104033 (Security Update)`	Important	Denial of Service	Maybe
.NET 9.0 installed on Windows	`5104033 (Security Update)`	Important	Denial of Service	Maybe

Patches

3 patches

Article	Type	Restart
`5104034`	Security Update	Maybe
`5104032`	Security Update	Maybe
`5104033`	Security Update	Maybe

Exploits & PoC

No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.

Detection Rules

No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.

Acknowledgments

41ae55e9310ff27fa6f26af4727e5590

References

MSRC Advisory MITRE NVD