Security readout for executives and security teams
Plain-English summary
CVE-2020-16862 is a high-severity Microsoft Dynamics 365 on-premises flaw. An authenticated attacker could send a crafted web request to a vulnerable server and run code under the SQL service account. The business risk is highest where Dynamics is internet-accessible or broadly reachable by low-privileged users.
Executive priority
Prioritize remediation for any on-premises Dynamics 365 9.0 server, especially if reachable by many users or exposed beyond trusted networks. Treat as a high business-risk issue because compromise can affect sensitive business data and backend SQL context.
Technical view
The vulnerability is improper validation and sanitization of web requests in Microsoft Dynamics 365 (on-premises) version 9.0.0. Successful exploitation can allow arbitrary code execution in the SQL service account context. Microsoft states the security update corrects input validation and sanitization behavior.
Likely exposure
Known affected exposure is Microsoft Dynamics 365 (on-premises) version 9.0.0. The source bundle does not identify cloud Dynamics 365 as affected. Risk depends on deployment reachability, authenticated user population, and SQL service account privileges.
Exploitation context
The source says exploitation requires authentication and a specially crafted request. CVSS lists network attack vector, low privileges, no user interaction, high confidentiality and integrity impact, and high attack complexity. No CISA KEV listing or cited source confirms active exploitation.
Researcher notes
Evidence is limited to Microsoft and CVE source data. The bundle names version 9.0.0 only, describes authenticated request-based RCE, and provides no public exploit procedure. Do not assume broader affected versions, active exploitation, or alternate mitigations without vendor confirmation.
Mitigation direction
- Apply Microsoft’s security update for CVE-2020-16862.
- Check Microsoft guidance for supported update paths.
- Limit Dynamics server access to trusted networks and users.
- Review SQL service account privileges for least privilege.
- Monitor Dynamics and SQL logs for abnormal authenticated activity.
Validation and detection
- Inventory all Microsoft Dynamics 365 on-premises deployments.
- Confirm whether any instance runs version 9.0.0.
- Verify the relevant Microsoft security update is installed.
- Review external and internal reachability to Dynamics servers.
- Confirm SQL service account privileges are constrained.
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
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-16862 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L/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.
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:H/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C1.65.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16862CVE reference · x_refsource_MISC
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.