Security readout for executives and security teams
Plain-English summary
An authorized user with local access to an affected Microsoft Dynamics 365 Business Central system could exploit improper input validation to expose confidential information. The issue does not affect integrity or availability according to the supplied CVSS vector, but disclosed business data could still create material operational or privacy risk.
Executive priority
Treat this as a normal-priority security update with elevated attention for systems holding sensitive financial, customer, or operational data. Prioritize affected installations with broad local-user access. Escalation beyond moderate urgency is not supported without evidence of exploitation or unusually sensitive exposure.
Technical view
CVE-2025-29821 is a CWE-20 improper input validation flaw affecting Business Central versions 23.0, 24.0, 25.0, and 26.0. Exploitation requires local access and low privileges, requires no user interaction, and has low attack complexity. Successful exploitation can cause high confidentiality impact without changing scope.
Likely exposure
Exposure is limited to organizations running the listed Business Central releases where authorized, low-privileged users can obtain local access. The source bundle does not identify specific configurations, deployment models, exposed data types, or affected components, so asset-level confirmation is required.
Exploitation context
The supplied sources do not support active exploitation, and the CVE is not listed as KEV in the bundle. The CVSS vector reports local access, low complexity, low privileges, and no user interaction. No public exploit availability or observed attack activity is established by this evidence.
Researcher notes
The supplied record establishes input-validation weakness and CVSS characteristics but provides no root-cause detail, affected code path, disclosed data class, exploit proof, or fixed-build information. Researchers should rely on Microsoft’s advisory for update applicability and avoid inferring remote reachability from the local attack vector.
Mitigation direction
- Inventory Business Central installations and identify versions 23.0, 24.0, 25.0, and 26.0.
- Review Microsoft’s CVE advisory for the applicable security update and deployment requirements.
- Apply the vendor-provided update according to Microsoft guidance and organizational change controls.
- Restrict unnecessary local access and low-privileged accounts until remediation is confirmed.
Validation and detection
- Confirm installed Business Central versions against the affected release list.
- Verify Microsoft’s applicable security update is installed on every affected instance.
- Recheck version and update status after deployment, including clustered or replicated systems.
- Review authorized local access for accounts that do not require Business Central system access.
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-20: 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-2025-29821 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C1.83.6microsoftVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
- Microsoft Dynamics Business Central Information Disclosure 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.