Security readout for executives and security teams
Plain-English summary
CVE-2021-33390 is a reported memory safety flaw in dpic 2021.04.10. The public record says a use-after-free occurs in the deletestringbox() function. Business urgency is unclear because no CVSS score, confirmed impact, affected product metadata, or patch status is provided in the source bundle.
Executive priority
Treat this as a targeted hygiene item unless dpic is used on untrusted input. Prioritize confirming whether dpic exists in documentation, publishing, or build workflows before assigning major incident-level urgency.
Technical view
The CVE describes a use-after-free in deletestringbox() in dpic.y in dpic 2021.04.10. It is explicitly described as different from CVE-2021-32421. The sources do not provide CWE, exploitability details, crash impact, code execution claims, or fixed-version information.
Likely exposure
Exposure appears limited to environments that use dpic 2021.04.10, especially where dpic processes diagram input from untrusted or semi-trusted sources. The source bundle does not identify CPEs, downstream packages, operating systems, or maintained affected version ranges.
Exploitation context
No provided source states active exploitation, and the CVE is not marked as CISA KEV. The bundle cites a public GitLab issue, but does not include evidence of weaponized exploitation, broad scanning, or exploitation in the wild.
Researcher notes
Evidence is sparse. The core facts are dpic 2021.04.10, a use-after-free in deletestringbox() in dpic.y, and a GitLab issue reference. Do not infer remote exploitability, code execution, or a fixed release from the provided sources.
Mitigation direction
- Check the dpic GitLab issue and maintainer guidance for confirmed fixes.
- Inventory systems and build pipelines using dpic 2021.04.10.
- Avoid processing untrusted dpic input until remediation status is confirmed.
- Run dpic in isolated, least-privileged environments where feasible.
Validation and detection
- Confirm whether dpic is installed and record its exact version.
- Identify workflows that process externally supplied diagram files.
- Review the referenced GitLab issue for fixed-version or workaround updates.
- Monitor CVE Program updates for CVSS, CWE, and affected-version clarification.
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.
CVE-2021-33390 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://gitlab.com/aplevich/dpic/-/issues/10CVE reference
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.