Security readout for executives and security teams
Plain-English summary
CVE-2021-31510 is a code-execution flaw in OpenText Brava! Desktop Build 16.6.4.55. A user must open malicious content or visit a malicious page. If triggered, attacker code can run with the user’s application privileges, creating confidentiality, integrity, and availability risk.
Executive priority
Treat as high priority where Brava! Desktop is deployed for document handling. The business risk is user-driven compromise through malicious files, not an exposed internet service. Confirm affected installations first, then follow OpenText remediation guidance.
Technical view
The flaw is in TIF parsing and is described as improper validation of user-supplied data causing a read past an allocated buffer. ZDI links it to ZDI-CAN-13675. The CVSS 3.0 score is 7.8 with user interaction required and high CIA impact.
Likely exposure
Exposure appears limited to environments running OpenText Brava! Desktop Build 16.6.4.55, especially where users open externally supplied TIF files or browser-delivered content associated with Brava.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires user interaction, so phishing, document exchange, or malicious file delivery are the plausible contexts supported by the sources.
Researcher notes
Evidence names only OpenText Brava! Desktop Build 16.6.4.55. The vulnerability is categorized as CWE-125 and tied to TIF parsing. Do not assume other builds, products, exploit availability, or patch details from this bundle alone.
Mitigation direction
- Inventory Brava! Desktop installations and identify Build 16.6.4.55.
- Check OpenText guidance for fixed versions or vendor-recommended mitigations.
- Reduce opening of untrusted TIF files on affected endpoints.
- Use endpoint controls to limit risky file associations where operationally feasible.
- Prioritize remediation for users handling external documents.
Validation and detection
- Confirm exact Brava! Desktop build numbers on managed endpoints.
- Review whether affected users receive TIF files from external parties.
- Check vendor advisory channels for patch or upgrade guidance.
- Review EDR alerts for suspicious Brava process behavior.
- Document compensating controls until vendor remediation is confirmed.
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-125: 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-2021-31510 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-21-688/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.