Home/CVE/Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.
CVE

CVE-2026-26171

Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.

Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.

HIGH · CVSS 7.5 EPSS 0.03084
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules16 YARA rules0
⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
CWE-611Improper Restriction of XML External Entity Reference
▤

Affected Products & Versions

5
microsoft .net>= 10.0.0 and < 10.0.6
microsoft .net>= 8.0.0 and < 8.0.26
microsoft .net>= 9.0.0 and < 9.0.15
microsoft powershell>= 7.5 and < 7.5.6
microsoft powershell>= 7.6 and < 7.6.1
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet System.Security.Cryptography.Xml HIGH fixed in 10.0.6
◈

Sigma Hunt Rules

16
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productcriticalBad Opsec Powershell Code Artifacts
productcriticalSuspicious PowerShell Mailbox Export to Share - PS
productcriticalSuspicious PowerShell Mailbox Export to Share
productcriticalHackTool - Empire PowerShell UAC Bypass
productcriticalHackTool - DInjector PowerShell Cradle Execution
producthighDelete Volume Shadow Copies Via WMI With PowerShell
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD14 Apr 2026 · 06:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

20
usnUSN-8216-1
usnUSN-8176-1
msrcCVE-2026-26171Denial of Service
rhsaRHSA-2026:9080Important
rhsaRHSA-2026:8473Important
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