Security readout for executives and security teams
Plain-English summary
This high-severity Dynamics 365 Sales flaw can let a low-privileged attacker present deceptive content to a user. Successful exploitation requires user interaction but may expose sensitive information and alter limited data. The supplied affected-version information is internally inconsistent, so organizations should confirm applicability through Microsoft’s advisory.
Executive priority
Treat as a high-priority remediation for confirmed affected deployments, especially those processing sensitive customer or sales data. Schedule prompt patching after version validation. Emergency incident response is not justified solely by this bundle because active exploitation is not established.
Technical view
CVE-2024-21396 is a CWE-79 spoofing vulnerability with CVSS 3.1 score 7.6. The vector indicates remote reachability, low complexity, low privileges, required user interaction, changed security scope, high confidentiality impact, low integrity impact, and no availability impact.
Likely exposure
Potential exposure is limited to Microsoft Dynamics 365 on-premises deployments matching Microsoft’s affected configurations. The bundle names version 9.1 but separately lists version 9.0, preventing a definitive version determination from the supplied evidence alone. Internet or broadly user-accessible deployments may present greater practical exposure.
Exploitation context
The supplied evidence does not establish active exploitation, and the CVE is not identified as CISA KEV-listed. CVSS records exploit maturity as unproven. Exploitation requires low privileges and a user action, reducing immediacy but not the potentially serious confidentiality impact.
Researcher notes
The affected data is ambiguous: it identifies Dynamics 365 on-premises version 9.1 while listing version 9.0. Researchers should rely on Microsoft’s record for exact builds and update applicability. The supplied sources provide no exploit mechanism, indicators of compromise, or confirmed exploitation evidence.
Mitigation direction
- Review Microsoft’s CVE advisory to resolve the affected-version discrepancy.
- Apply the Microsoft-provided security update appropriate to the confirmed deployment.
- Prioritize externally accessible or sensitive-data Dynamics 365 instances.
- Restrict unnecessary user access while remediation is pending.
Validation and detection
- Inventory all on-premises Dynamics 365 versions and deployment roles.
- Compare installed build and update status with Microsoft’s advisory.
- Confirm the applicable Microsoft security update is installed successfully.
- Review relevant application and security logs for suspicious user-driven content activity.
Public sources used
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-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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-2024-21396 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
- 7.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/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:L/UI:R/S:C/C:H/I:L/A:N/E:U/RL:O/RC:C2.34.7microsoftVulnerability scoring details
Base CVSS 3.1 score
7.6HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N/E:U/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
- Dynamics 365 Sales Spoofing 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.