Security readout for executives and security teams
Plain-English summary
CVE-2021-40607 is a denial-of-service issue in GPAC 1.0.1 involving MP4Box processing of a crafted file. The sources do not provide CVSS scoring, affected CPEs, or a confirmed fixed version. Treat this as most relevant where GPAC/MP4Box processes untrusted media files.
Executive priority
Prioritize based on exposure. Internet-facing or partner-facing media upload services using GPAC/MP4Box deserve prompt review; environments without GPAC or untrusted media processing are lower concern.
Technical view
The CVE description names the schm_box_size function in GPAC 1.0.1 and says a crafted file passed to MP4Box can cause denial of service. Public data provided does not identify the root cause class, patch commit, reliable affected range beyond 1.0.1, or confirmed exploit activity.
Likely exposure
Exposure is likely limited to systems running GPAC MP4Box, especially automated media ingestion, transcoding, validation, or upload pipelines that process files from users or external partners.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. The attack condition described is file-based denial of service, so practical risk depends on whether an attacker can supply media for MP4Box processing.
Researcher notes
Evidence is sparse. The CVE text identifies GPAC 1.0.1, MP4Box, schm_box_size, and denial of service only. No CVSS vector, CWE, patch reference, or active exploitation evidence is included in the provided bundle.
Mitigation direction
- Inventory systems using GPAC MP4Box, especially version 1.0.1.
- Check GPAC vendor guidance or issue 1879 for fixed-version details.
- Restrict untrusted media processing where MP4Box is used.
- Run media processing in sandboxed, resource-limited workers.
- Monitor MP4Box crashes and failed media-processing jobs.
Validation and detection
- Confirm whether GPAC or MP4Box is present in production images.
- Identify workflows that process user-supplied or partner-supplied media.
- Compare deployed GPAC versions against vendor guidance.
- Review crash logs for MP4Box failures during media ingestion.
- Verify sandbox and resource limits around media-processing workers.
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-2021-40607 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://github.com/gpac/gpac/issues/1879CVE 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.