Security readout for executives and security teams
Plain-English summary
CVE-2021-31514 is a high-severity code execution flaw in OpenText Brava! Desktop Build 16.6.4.55. A user must open a malicious file or visit a malicious page. If successful, the attacker’s code runs with the user’s application privileges, creating risk to confidentiality, integrity, and availability.
Executive priority
Prioritize remediation where Brava! Desktop is deployed to users handling external design or document files. The issue enables full impact code execution after user interaction, but available sources do not show confirmed active exploitation.
Technical view
The flaw is a CWE-787 out-of-bounds write in CGM file parsing in OpenText Brava! Desktop Build 16.6.4.55. Improper validation of user-supplied CGM data can write past an allocated buffer and enable arbitrary code execution in the current process. CVSS v3.0 is 7.8 with user interaction required.
Likely exposure
Exposure is likely limited to endpoints with OpenText Brava! Desktop Build 16.6.4.55 installed, especially where users open CGM or related design/document files from email, web downloads, shared drives, or external partners.
Exploitation context
The sources describe user-assisted exploitation through a malicious page or malicious file. The provided KEV signal is false, and no cited source confirms active exploitation. Treat this as plausible targeted phishing or document-delivery risk, not confirmed in-the-wild exploitation.
Researcher notes
The core issue is CGM parser memory corruption from insufficient bounds validation. Public sources identify ZDI-CAN-13679 and Build 16.6.4.55. Do not assume other OpenText products or versions are affected unless vendor sources confirm them.
Mitigation direction
- Inventory and remove OpenText Brava! Desktop Build 16.6.4.55 where unnecessary.
- Check OpenText guidance for fixed versions or vendor-supported remediation.
- Block or quarantine untrusted CGM files at email and web gateways.
- Restrict Brava! Desktop file associations where CGM handling is not required.
- Use endpoint controls to limit execution from user-writable download locations.
Validation and detection
- Identify endpoints running OpenText Brava! Desktop Build 16.6.4.55.
- Confirm whether users process CGM files from external or untrusted sources.
- Review email and web controls for CGM attachment and download handling.
- Check vendor advisories for the installed build’s remediation status.
- Monitor endpoint alerts for suspicious child processes from Brava! Desktop.
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-2021-31514 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-21-692/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.