Evidence used
- CISA confirms exploitation in the wild.
- The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
- EPSS is 14.02% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2023
CVE-2023-38180High confidence
Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability
Microsoft · .NET Core and Visual Studio
Official source article: Siemens SSA-341067 ↗. Check the applicable product and release in the original source.
7.5HighCVSS 3.1
Patch only the product branches with a verified fix
Fix availability varies by productCISA confirms exploitation in the wild and lists 2023-08-30 as the remediation due date. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityHigh→Operational priority:Critical, raised one band.upgradedsince 9 Aug 2023
Compensating controls
- Validate the affected product branch and deploy the verified fixed release.
- Restrict the affected network interface to trusted sources where business-safe.
- Increase monitoring for the attack path and post-exploitation behaviour described in the report.
Verification
- Confirm that the asset runs Microsoft .NET Core and Visual Studio and falls inside the recorded affected range.
- Verify the installed build against the product-specific fixed version after deployment.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Remediation availability differs by product scope
Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
- Siemens ProductCERT: 1 affected or under-investigation product state without a fixed product state in the same current advisory
Open-source package ranges18 source-attributed ranges
These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.
| Ecosystem and package | Affected range | First fixed version | Evidence |
|---|---|---|---|
| NuGetMicrosoft.AspNetCore.App.Runtime.win-arm64 | ECOSYSTEM: introduced 7.0.0; fixed 7.0.10 | 7.0.10 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.App.Runtime.win-arm64 | ECOSYSTEM: introduced 6.0.0; fixed 6.0.21 | 6.0.21 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.App.Runtime.win-x64 | ECOSYSTEM: introduced 7.0.0; fixed 7.0.10 | 7.0.10 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.App.Runtime.win-x64 | ECOSYSTEM: introduced 6.0.0; fixed 6.0.21 | 6.0.21 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.App.Runtime.win-x86 | ECOSYSTEM: introduced 7.0.0; fixed 7.0.10 | 7.0.10 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.App.Runtime.win-x86 | ECOSYSTEM: introduced 6.0.0; fixed 6.0.21 | 6.0.21 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.Server.Kestrel.Transport.Libuv | ECOSYSTEM: introduced 6.0.0; fixed 6.0.21 | 6.0.21 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.Server.Kestrel.Transport.Libuv | ECOSYSTEM: introduced 0; fixed 2.1.40 | 2.1.40 | OSV record ↗aggregator derived · 22 Oct 2025 |
| NuGetMicrosoft.AspNetCore.Server.Kestrel.Transport.Sockets | ECOSYSTEM: introduced 0; fixed 2.1.40 | 2.1.40 | OSV record ↗aggregator derived · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-arm64 | >= 7.0.0, <= 7.0.9 | 7.0.10 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-arm64 | >= 6.0.0, <= 6.0.20 | 6.0.21 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-x64 | >= 7.0.0, <= 7.0.9 | 7.0.10 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-x64 | >= 6.0.0, <= 6.0.20 | 6.0.21 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-x86 | >= 7.0.0, <= 7.0.9 | 7.0.10 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.App.Runtime.win-x86 | >= 6.0.0, <= 6.0.20 | 6.0.21 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.Server.Kestrel.Transport.Libuv | >= 6.0.0, <= 6.0.20 | 6.0.21 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.Server.Kestrel.Transport.Libuv | <= 2.1.39 | 2.1.40 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
| nugetMicrosoft.AspNetCore.Server.Kestrel.Transport.Sockets | <= 2.1.39 | 2.1.40 | GitHub advisory ↗upstream repository advisory · 22 Oct 2025 |
Direct vendor intelligence
1 currentAuthoritative vendor CSAF and VEX advisories
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
SSA-341067 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-341067: Multiple vulnerabilities in third-party components in ST7 ScadaConnect before V1.1
The vendor explicitly identifies these products as affected by this CVE.
- ST7 ScadaConnect (6NH7997-5DA10-0AA0)
- Summary
- .NET and Visual Studio Denial of Service Vulnerability
- Remediation
- Update to V1.1 or later version
CISA confirms exploitation in the wild and lists 2023-08-30 as the remediation due date. Verified remediation exists for at least one product or source, but 1 structured product or package state remain unresolved. Apply remediation only to the exact product branch confirmed by its source.
Fix availability varies by product01
What, why and how
Microsoft .NET Core and Visual Studio contain an unspecified vulnerability that allows for denial-of-service (DoS).
What
Microsoft .NET Core and Visual Studio contain an unspecified vulnerability that allows for denial-of-service (DoS).
Why
The product does not properly control the allocation and maintenance of a limited resource.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
Microsoft .NET Core and Visual Studio contain an unspecified vulnerability that allows for denial-of-service (DoS).
Why
The product does not properly control the allocation and maintenance of a limited resource.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation Confirmed in the wild
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.CISA added this CVE to its Known Exploited Vulnerabilities catalogue on 2023-08-09.
Public PoC / exploit material None recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.
- Likely attack path
- a network path → Uncontrolled Resource Consumption → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- None
- Attack complexity
- Low: no specialised conditions are recorded
- Security boundary
- Unchanged: impact remains within the vulnerable component's security authority
- Weakness
?
CWE means Common Weakness Enumeration: a standard category for the underlying weakness. - CWE-400 ↗
CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.
- CVSS vector
?
CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:CCommon Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.- Post-exploitation / living off the land
- No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
03
Patch and workaround
Operational remediation based on structured source evidence.
- Status
?
Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change. - Fix availability varies by product
- Action
- Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
- Workaround
- No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 8 Aug 2023 · Last source change 10 Aug 2026, 15:12 UTC · CWE-400 · Uncontrolled Resource Consumption
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-08-14
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2023-2363
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceCISA ADP
NVD statusNVD enriched
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Affected versionsThe structured affected or fixed version information changed.CNA ↗
- Before
- 6.0.0 < 6.0.21; 7.0.0 < 7.0.10; 2.0 < 2.1.40; 17.2.0 < 17.2.18; 17.4.0 < 17.4.10; 17.6.0 < 17.6.6 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
- After
- .NET 6.0: 6.0.0 < 6.0.21; .NET 7.0: 7.0.0 < 7.0.10; ASP.NET Core 2.1: 2.0 < 2.1.40; Microsoft Visual Studio 2022 version 17.2: 17.2.0 < 17.2.18; Microsoft Visual Studio 2022 version 17.4: 17.4.0 < 17.4.10; Microsoft Visual Studio 2022 version 17.6: 17.6.0 < 17.6.6 · Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
CVE published
Added to CISA KEV
Fixed release or patch reference recorded
Technical terms and abbreviations used in this report
- CVE
- Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
- CVSS
- Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
- EPSS
- Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
- CWE
- Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
- CNA
- CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
- CISA ADP
- Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
- NVD
- National Vulnerability Database: NIST's enrichment service for CVE records.
- CERT / CSIRT
- A computer security incident response team that publishes warnings or coordinates incident response.
- PoC
- Proof of concept: public material that demonstrates or helps reproduce exploitation.
- CSAF
- Common Security Advisory Framework: a machine-readable format for security advisories.
- LoTL
- Living off the land: abuse of legitimate tools or system functions during an attack.