ASP.NET Core and Visual Studio Denial of Service Vulnerability
Priority MEDIUM 42CWE-770Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from Microsoft.
Summary
Allocation of resources without limits or throttling in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01749 77th percentileScored 2026-11-07
Fix Partial ASP.NET Core 8.0 (Microsoft): 8.0.15ASP.NET Core 9.0 (Microsoft): 9.0.4+4 more productsRed Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | ASP.NET Core 8.0 | 8.0 to before 8.0.15 | 8.0.15 | Patch available | CNA |
| Microsoft | ASP.NET Core 9.0 | 9.0 to before 9.0.4 | 9.0.4 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2022 version 17.10 | 17.10.0 to before 17.10.13 | 17.10.13 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2022 version 17.12 | 17.12.0 to before 17.12.7 | 17.12.7 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2022 version 17.13 | 17.13.0 to before 17.13.6 | 17.13.6 | Patch available | CNA |
| Microsoft | Microsoft Visual Studio 2022 version 17.8 | 17.8.0 to before 17.8.20 | 17.8.20 | Patch available | CNA |
- ASP.NET Core 8.0 VendorMicrosoft Affected 8.0 to before 8.0.15 Fixed in 8.0.15 Patch available CNA
- ASP.NET Core 9.0 VendorMicrosoft Affected 9.0 to before 9.0.4 Fixed in 9.0.4 Patch available CNA
- Microsoft Visual Studio 2022 version 17.10 VendorMicrosoft Affected 17.10.0 to before 17.10.13 Fixed in 17.10.13 Patch available CNA
- Microsoft Visual Studio 2022 version 17.12 VendorMicrosoft Affected 17.12.0 to before 17.12.7 Fixed in 17.12.7 Patch available CNA
- Microsoft Visual Studio 2022 version 17.13 VendorMicrosoft Affected 17.13.0 to before 17.13.6 Fixed in 17.13.6 Patch available CNA
- Microsoft Visual Studio 2022 version 17.8 VendorMicrosoft Affected 17.8.0 to before 17.8.20 Fixed in 17.8.20 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* | 8.0.0 to before 8.0.15; 9.0.0 to before 9.0.4 | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* | 17.8.0 to before 17.8.20; 17.10.0 to before 17.10.13; 17.12.0 to before 17.12.7; 17.13.0 to before 17.13.6 | Vulnerable | Microsoft |
- cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:* Versions 8.0.0 to before 8.0.15; 9.0.0 to before 9.0.4 Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:* Versions 17.8.0 to before 17.8.20; 17.10.0 to before 17.10.13; 17.12.0 to before 17.12.7; 17.13.0 to before 17.13.6 Vulnerable ·Microsoft
Remediation
- Fix · CNA ASP.NET Core 8.0 (Microsoft) Fixed in 8.0.15
- Fix · CNA ASP.NET Core 9.0 (Microsoft) Fixed in 9.0.4
- Fix · CNA Microsoft Visual Studio 2022 version 17.10 (Microsoft) Fixed in 17.10.13
- Fix · CNA Microsoft Visual Studio 2022 version 17.12 (Microsoft) Fixed in 17.12.7
- Fix · CNA Microsoft Visual Studio 2022 version 17.13 (Microsoft) Fixed in 17.13.6
- Fix · CNA Microsoft Visual Studio 2022 version 17.8 (Microsoft) Fixed in 17.8.20
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Out of support scope |
Not affected: 3 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Microsoft
Microsoft's page for this CVE →
- Impact
- Denial of Service
- Exploited
- No
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
| Product | Status | Plan or fix |
|---|---|---|
| ASP.NET Core 8.0 | Fixed | 8.0.15 · Security Update |
| ASP.NET Core 9.0 | Fixed | 9.0.4 · Security Update |
| Microsoft Visual Studio 2022 version 17.10 | Fixed | 17.10.13 · Security Update |
| Microsoft Visual Studio 2022 version 17.12 | Fixed | 17.12.7 · Security Update |
| Microsoft Visual Studio 2022 version 17.13 | Fixed | 17.13.6 · Security Update |
| Microsoft Visual Studio 2022 version 17.8 | Fixed | 17.8.20 · Security Update |
Timeline
- 2026-10-02 Threatist record created from CVE-2025-26682
- 2026-10-03 Alias added: GHSA-gf2r-7cq8-xww9
References
More Microsoft Asp.net Core vulnerabilities
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
- TI-2025-34970 ASP.NET Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.9
- TI-2024-14164 .NET Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2023-18092 ASP.NET Core Denial of Service Vulnerability CVSS 3.1HIGH 8.2
- TI-2023-18392 ASP.NET Core Security Feature Bypass Vulnerability CVSS 3.1MEDIUM 6.2
Sources
- CVE-2025-26682 · CVE Program
- CVE-2025-26682 · NVD
- FIRST EPSS
- GHSA-gf2r-7cq8-xww9 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-26682 · Microsoft Security Update Guide
- CVE-2025-26682 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences