Security readout for executives and security teams
Plain-English summary
CVE-2021-31499 is a high-severity flaw in OpenText Brava! Desktop 16.6.3.84. A user must open a malicious file or visit a malicious page, but successful exploitation could let an attacker run code with the user’s privileges. The main business risk is workstation compromise through document-handling workflows.
Executive priority
Treat this as a targeted workstation compromise risk, not a broad internet-facing emergency. Prioritize teams using Brava! Desktop for external files, especially design, engineering, or review workflows. Remediation depends on OpenText guidance because the provided sources do not name a specific patch.
Technical view
The flaw is in DWF file parsing in OpenText Brava! Desktop 16.6.3.84. Improper validation of user-supplied data can cause a write past the end of an allocated buffer, classified as CWE-787. The reported impact is arbitrary code execution in the current process context, with CVSS 3.0 score 7.8.
Likely exposure
Exposure is most likely on endpoints where OpenText Brava! Desktop 16.6.3.84 is installed and users handle DWF files or web-delivered content. The source bundle does not identify other affected versions or server-side exposure.
Exploitation context
The sources describe remote attackers requiring user interaction: the target must visit a malicious page or open a malicious file. The bundle states this CVE is not in KEV, and no cited source here confirms active exploitation.
Researcher notes
ZDI identifies this as ZDI-CAN-12745 and describes a DWF parser buffer overrun caused by insufficient validation. Avoid assuming exploit availability, affected versions beyond 16.6.3.84, or patch details from this bundle. Validate exposure through installed-version evidence and user workflow mapping.
Mitigation direction
- Inventory Brava! Desktop installations and identify version 16.6.3.84.
- Check OpenText support guidance for fixed versions or vendor-approved workarounds.
- Restrict opening untrusted DWF files and web-delivered files in Brava! Desktop.
- Prioritize endpoint protections for users who routinely receive external design files.
Validation and detection
- Confirm whether OpenText Brava! Desktop 16.6.3.84 exists in software inventory.
- Review file-association and workflow exposure for DWF handling on affected endpoints.
- Check endpoint telemetry for suspicious Brava! Desktop crashes or child processes.
- Verify vendor guidance is applied once a fixed version or workaround is identified.
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-2021-31499 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-21-639/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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.