Security readout for executives and security teams
Plain-English summary
CVE-2021-31490 is a remote code execution flaw in OpenText Brava! Desktop 16.6.3.84. A user must open a malicious DWF file or visit a malicious page. Successful exploitation could run attacker code as the current user, affecting workstation confidentiality, integrity, and availability.
Executive priority
Treat as a high-priority workstation risk where Brava! Desktop 16.6.3.84 is present. It is not described as remotely exploitable without user action, but successful exploitation could give an attacker code execution in a user context.
Technical view
The flaw is in DWF file parsing and is classified as CWE-787 out-of-bounds write. Insufficient validation of user-supplied data can write past an allocated buffer. CVSS 3.0 is 7.8 with user interaction required and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to environments with OpenText Brava! Desktop 16.6.3.84 installed, especially users who open externally supplied DWF files or access untrusted content. The source bundle does not identify additional affected versions or products.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires user interaction: the target must open a malicious file or visit a malicious page. No exploit steps should be inferred from the advisory summary.
Researcher notes
Key constraints are important: affected product evidence is limited to Brava! Desktop 16.6.3.84, user interaction is required, and the provided sources do not name a patch. Validation should focus on product inventory, DWF handling workflows, and vendor remediation confirmation.
Mitigation direction
- Inventory endpoints for OpenText Brava! Desktop 16.6.3.84.
- Check OpenText or ZDI guidance for fixed versions or workarounds.
- Restrict untrusted DWF file handling until remediation is confirmed.
- Use least privilege to reduce impact if code execution occurs.
- Warn users about unexpected DWF files and related links.
Validation and detection
- Confirm installed Brava! Desktop versions on managed workstations.
- Review exposure to externally supplied DWF files or links.
- Check vendor advisory status before declaring remediation complete.
- Verify endpoint controls cover malicious document delivery paths.
- Document exceptions where vulnerable software remains installed.
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-787: 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 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-2021-31490 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
- 7.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/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:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.zerodayinitiative.com/advisories/ZDI-21-630/CVE 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.