CVE-2026-70196ImportantDoSNetwork
ASP.NET Core Denial of Service Vulnerability
Assessment
Inefficient algorithmic complexity in ASP.NET Core allows an unauthorized attacker to deny service over a network.
- Severity
- Important
- CVSS base score
- 5.9CVSS:3.1/
AV:N/ AC:H/ PR:N/ UI:N/ S:U/ C:N/ I:N/ A:H/ E:U/ RL:O/ RC:C - Impact
- Denial of Service
- EPSS, next 30 days
- Not scored yet
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- ASP.NET Core
- Weakness
- CWE-407: Inefficient Algorithmic Complexity
- Issued by
- Microsoft
- Published
- 13 Oct 2026 · October 2026
- Last revised
- 13 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
- Attack vector
- NetworkAV:N
- Attack complexity
- HighAC:H
- Privileges required
- NonePR:N
- User interaction
- NoneUI:N
- Scope
- UnchangedS:U
- Confidentiality
- NoneC:N
- Integrity
- NoneI:N
- Availability
- HighA:H
Updates that fix it
3 KBs| KB | Type | Applies to | Other CVEs |
|---|---|---|---|
| KB5130034 | Security Update | ASP.NET Core 8.0 | All CVEs in KB5130034 |
| KB5130035 | Security Update | ASP.NET Core 9.0 | All CVEs in KB5130035 |
| KB5130036 | Security Update | ASP.NET Core 10.0 | All CVEs in KB5130036 |
Affected products
Developer Tools5 affected products
- ASP.NET Core 10.0
- ASP.NET Core 8.0
- ASP.NET Core 9.0
- Microsoft Visual Studio 2022 version 17.14
- Microsoft Visual Studio 2026 version 18.10
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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