OnlyFm252
ASP.NET Core

CVE-2025-26682 — ASP.NET Core and Visual Studio Denial of Service Vulnerability

Important CVSS 7.5 EPSS 0.01267 2025-04 archive

Executive Summary

Allocation of resources without limits or throttling in ASP.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
Released Apr 8 2025
Last Updated Apr 8 2025
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01267 — 0.65909 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

0.01267
probability of exploitation in the next 30 days
0.65909 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

6 affected products
Product KB Article Severity Impact Restart Required
ASP.NET Core 8.0 Release Notes (Security Update) Important Denial of Service Maybe
ASP.NET Core 9.0 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2022 version 17.10 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2022 version 17.12 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2022 version 17.13 Release Notes (Security Update) Important Denial of Service Maybe
Microsoft Visual Studio 2022 version 17.8 Release Notes (Security Update) Important Denial of Service Maybe

Patches

1 patch
Article Type Restart
Release Notes Security Update Maybe

Known Exploits

Acknowledgments

James Newton-King with Microsoft

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