Security readout for executives and security teams
Plain-English summary
CVE-2021-40772 is a high-severity Adobe Prelude flaw triggered when a user opens a malicious M4A file. Successful exploitation could run code as that user, creating risk to creative workstations and any sensitive files or credentials accessible from them.
Executive priority
Treat this as a high-priority endpoint remediation issue for creative or media-processing environments. It is not evidenced as actively exploited in the supplied sources, but code execution from a malicious file can compromise workstations and business data.
Technical view
Adobe Prelude 10.1 and earlier have a memory corruption issue tied to insecure M4A parsing. The CVSS 3.0 score is 7.8, with local attack vector, low complexity, no privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely on endpoints still running Adobe Prelude 10.1 or earlier, especially where users handle externally supplied audio or media files.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires convincing a user to open a specially crafted M4A file, so phishing, file sharing, or media intake workflows are plausible delivery paths.
Researcher notes
Evidence is limited to CVE data and Adobe APSB21-96. The vulnerability is CWE-788 memory access past buffer bounds, resulting in possible arbitrary code execution in the current user context. Do not assume network exploitation without user file interaction.
Mitigation direction
- Inventory Adobe Prelude installations and identify versions 10.1 or earlier.
- Check Adobe APSB21-96 for vendor-recommended updates or mitigations.
- Prioritize remediation on media-production and file-intake workstations.
- Restrict handling of untrusted M4A files until vendor guidance is applied.
- Use least-privilege workstation accounts where feasible.
Validation and detection
- Review asset inventory for Adobe Prelude installations and versions.
- Confirm whether any installed version is 10.1 or earlier.
- Identify teams that receive or open external M4A files.
- Verify remediation status against Adobe APSB21-96 guidance.
- Document residual exposure for unsupported or unpatched systems.
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-788: 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-2021-40772 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://helpx.adobe.com/security/products/prelude/apsb21-96.htmlCVE 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.
Access of Memory Location After End of Buffer
Access of Memory Location After End of Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.