Security readout for executives and security teams
Plain-English summary
CVE-2020-26207 is a high-severity file-opening risk in DatabaseSchemaViewer. A user who opens a malicious .dbschema file in an affected version could trigger arbitrary code execution. The vendor released a fix in version 2.7.4.3.
Executive priority
Prioritize remediation where the tool is used by developers, database teams, or administrators handling external schema files. This is not documented as actively exploited, but successful exploitation could execute code after social engineering.
Technical view
The vulnerability is unsafe deserialization, mapped to CWE-502, in DatabaseSchemaViewer/dbschemareader before 2.7.4.3. The documented trigger is opening a specially crafted .dbschema file. CVSS 3.1 is 8.0 with required user interaction and high impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is likely limited to systems where DatabaseSchemaViewer/dbschemareader versions before 2.7.4.3 are installed and users can receive or open .dbschema files from untrusted sources.
Exploitation context
The provided sources do not show known active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires tricking a user into opening a crafted .dbschema file in an affected application version.
Researcher notes
The evidence identifies a patched release and a commit, but does not provide active-exploitation evidence or broad product telemetry. Validation should focus on installed versions, .dbschema workflows, and whether untrusted schema files enter the environment.
Mitigation direction
- Upgrade DatabaseSchemaViewer/dbschemareader to version 2.7.4.3 or later.
- Do not open .dbschema files from untrusted or unexpected sources.
- Restrict .dbschema file handling to trusted users and trusted locations.
- Check vendor advisory and release notes for any newer guidance.
Validation and detection
- Inventory endpoints and developer workstations for DatabaseSchemaViewer/dbschemareader installations.
- Confirm installed versions are 2.7.4.3 or later.
- Review email, download, and file-sharing paths for untrusted .dbschema files.
- Verify users who handle schema files know the trusted-source requirement.
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-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. 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 lookupExecution 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-2020-26207 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
- 8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
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:R/S:C/C:H/I:H/A:H1.36Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8HighVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/martinjw/dbschemareader/security/advisories/GHSA-rfjh-m356-mpqfCVE reference · x_refsource_CONFIRM
- https://github.com/martinjw/dbschemareader/commit/4c0ab7b1fd8c4e3140f9fd54d303f107a9c8d994CVE reference · x_refsource_MISC
- https://github.com/martinjw/dbschemareader/releases/tag/2.7.4.3CVE 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.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.