Security readout for executives and security teams
Plain-English summary
CVE-2021-46816 is a high-severity Adobe Premiere Pro flaw where opening a malicious M4A audio file could let an attacker run code as the logged-in user. It needs user interaction, so exposure is mainly users who import or review external media files in affected Premiere Pro versions.
Executive priority
Treat this as a prioritized workstation remediation issue for creative and media teams, especially where external audio or project assets are common. It is high impact, but requires user interaction and has no provided evidence of active exploitation.
Technical view
Adobe Premiere Pro 15.4 and earlier have a memory corruption issue classified as CWE-787. The CVSS 3.1 score is 7.8 with local attack vector and required user interaction. Successful exploitation could affect confidentiality, integrity, and availability in the current user context.
Likely exposure
Organizations are most exposed where Adobe Premiere Pro 15.4 or earlier is installed and users handle untrusted M4A files from clients, vendors, downloads, or shared media libraries.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires a victim to open a malicious M4A file, limiting mass exploitation but leaving targeted media-file delivery plausible.
Researcher notes
Focus validation on version exposure, media-file intake paths, and whether affected users run with elevated privileges. The bundle does not provide exploit telemetry, proof-of-concept status, or a named fixed version, so avoid assumptions beyond Adobe guidance.
Mitigation direction
- Identify Adobe Premiere Pro 15.4 and earlier installations.
- Apply Adobe APSB21-67 guidance for affected Premiere Pro systems.
- Restrict opening unsolicited M4A files on affected workstations.
- Use least-privilege user accounts for media production systems.
- Prioritize endpoints handling external client or vendor media.
Validation and detection
- Inventory Premiere Pro versions across managed endpoints.
- Confirm affected systems are remediated according to Adobe APSB21-67.
- Review security controls for handling external M4A files.
- Check endpoint alerts involving suspicious media files and Premiere Pro.
- Verify users handling external media received file-safety guidance.
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-787: 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-2021-46816 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/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_pro/apsb21-67.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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.