Security readout for executives and security teams
Plain-English summary
CVE-2021-31485 affects OpenText Brava! Desktop 16.6.3.84. A crafted DWF file can trigger memory corruption and let an attacker run code as the user. This is not a remote server exposure; it depends on a user opening a malicious file or visiting a malicious page.
Executive priority
Treat this as a high-priority workstation risk for teams using Brava! Desktop with DWF files. It can lead to user-context code execution, but urgency is lower than an unauthenticated internet-facing flaw because user interaction is required.
Technical view
The flaw is a CWE-122 heap-based buffer overflow in DWF file parsing. Brava! Desktop fails to validate user-supplied data length before copying it into a fixed-length heap buffer, enabling arbitrary code execution in the current process. CVSS v3.0 is 7.8 with local attack vector and required user interaction.
Likely exposure
Exposure is likely limited to workstations with OpenText Brava! Desktop 16.6.3.84 installed, especially users who receive or review DWF files. Systems without that product/version are not indicated as affected by the provided sources.
Exploitation context
The bundle reports no CISA KEV listing and provides no evidence of active exploitation. Exploitation requires social engineering or content delivery that causes a user to open a malicious DWF file or visit a malicious page.
Researcher notes
The provided evidence identifies OpenText Brava! Desktop 16.6.3.84 and DWF parsing as the affected surface. Patch details are not present in the bundle, so remediation should be tied to vendor guidance. Avoid assuming other OpenText products or versions are affected.
Mitigation direction
- Inventory and prioritize OpenText Brava! Desktop 16.6.3.84 installations.
- Check OpenText guidance for fixed versions or supported remediation.
- Limit opening of untrusted DWF files until remediation is confirmed.
- Use email and endpoint controls to block suspicious DWF delivery.
- Remove or restrict Brava! Desktop where business need is absent.
Validation and detection
- Confirm installed Brava! Desktop versions across managed endpoints.
- Identify users who routinely open DWF files from external sources.
- Review email and endpoint telemetry for unexpected DWF file handling.
- Verify remediation status against OpenText or ZDI advisory details.
- Document exceptions where affected systems cannot be updated promptly.
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-122: Exact CWE lookup
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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-2021-31485 mapping review
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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-21-625/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.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.