Security readout for executives and security teams
Plain-English summary
This vulnerability can let an unauthenticated remote attacker exhaust resources in affected .NET environments, disrupting applications or services. The supplied CVSS score is 7.5 because availability may be severely affected, while confidentiality and data integrity are not expected to be compromised.
Executive priority
Treat this as a high-priority availability risk. Remediate exposed or business-critical services promptly, while recognizing that the supplied evidence does not show data theft, integrity loss, or confirmed active exploitation.
Technical view
CVE-2024-21386 is a CWE-400 resource-consumption denial-of-service flaw affecting listed ASP.NET Core 6.0, 7.0, and 8.0 releases and listed Visual Studio 2022 versions. Its CVSS vector indicates network reachability, low attack complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Prioritize systems running the listed ASP.NET Core releases, especially network-accessible applications. The bundle also identifies Visual Studio 2022 versions 17.4, 17.6, and 17.8, but does not explain the conditions under which those installations are exposed.
Exploitation context
The supplied temporal vector reports proof-of-concept exploit maturity. However, the CVE is not listed as KEV, and the source bundle provides no evidence of active exploitation. Treat exploitation status as unconfirmed rather than assuming attacks are occurring.
Researcher notes
The available description does not identify the vulnerable component, triggering input, resource type, fixed build numbers, or affected configuration prerequisites. The affected-version entries are broad. Consult the Microsoft advisory and CVE record for precise applicability; avoid inferring that every application on a listed major release is exploitable.
Mitigation direction
- Review Microsoft's CVE advisory for applicable security updates and deployment guidance.
- Update affected ASP.NET Core and Visual Studio installations according to Microsoft's supported instructions.
- Prioritize externally reachable and business-critical .NET services.
- Monitor resource exhaustion, service instability, and unusual request spikes until remediation is verified.
Validation and detection
- Inventory deployed ASP.NET Core runtimes, SDKs, applications, and listed Visual Studio versions.
- Compare installed versions and update status with Microsoft's CVE advisory.
- Confirm security updates are present across production, staging, build, and developer systems.
- Use non-destructive availability monitoring to verify services remain stable after remediation.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-21386 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C3.93.6microsoftVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- .NET Denial of Service VulnerabilityCVE reference, microsoft · vendor-advisory, patch
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.