Security readout for executives and security teams
Plain-English summary
A malicious audio file can crash or take control of Adobe Premiere Elements when a user opens it. The attack runs with the user’s permissions, so impact depends on that account’s access. This is high urgency for workstations that process media from clients, vendors, or unknown sources.
Executive priority
Prioritize remediation for user workstations that handle outside media. This is not remotely exploitable by itself, but a single opened file could give an attacker code execution under the user’s account.
Technical view
CVE-2021-40701 is a memory corruption flaw in Adobe Premiere Elements 2021.2235820 and earlier caused by insecure handling of crafted m4a files. CVSS 3.0 is 7.8, with local attack vector, low complexity, no privileges required, and required user interaction. Successful exploitation could allow arbitrary code execution as the current user.
Likely exposure
Exposure is mainly on endpoints with Adobe Premiere Elements 2021.2235820 or earlier, especially creative, marketing, training, or intake workflows that open externally supplied audio/media files.
Exploitation context
The source bundle does not show CISA KEV listing or other cited evidence of active exploitation. Exploitation requires convincing a user to open a malicious m4a file in the affected application.
Researcher notes
Evidence is limited to the CVE record and Adobe advisory reference. The bundle names the vulnerable handling of m4a files, CWE-788, and arbitrary code execution impact, but does not provide exploit status, fixed build details, or indicators of compromise.
Mitigation direction
- Inventory endpoints for Adobe Premiere Elements 2021.2235820 and earlier.
- Follow Adobe APSB21-78 guidance to update or remediate affected installations.
- Restrict opening untrusted m4a files from email, chat, and external submissions.
- Remove Premiere Elements from systems where it is not operationally needed.
- Use least-privilege user accounts on media-processing workstations.
Validation and detection
- Confirm installed Premiere Elements versions against the affected version stated in the CVE.
- Verify remediation status using Adobe APSB21-78 or vendor-managed update records.
- Check whether media teams receive or open external m4a files.
- Review endpoint detections for suspicious activity following unexpected media-file opens.
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-2021-40701 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/premiere_elements/apsb21-78.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.