Security readout for executives and security teams
Plain-English summary
This issue affects Adobe Premiere Rush 1.5.16 and earlier. A malicious MP4 file or page could cause the application to expose sensitive information from memory. It requires user interaction, so the main business risk is to users who handle untrusted media files.
Executive priority
Treat as a moderate-priority desktop application risk. It is not reported as actively exploited, but affected creative users handling external media should be remediated promptly because the impact is sensitive information disclosure.
Technical view
CVE-2021-43746 is an uninitialized pointer issue in Adobe Premiere Rush MP4 parsing, mapped to CWE-824. The CVSS 3.1 score is 5.5, with high confidentiality impact, no integrity or availability impact, no privileges required, and user interaction required.
Likely exposure
Exposure is likely limited to endpoints running Adobe Premiere Rush 1.5.16 or earlier, especially users who open externally supplied MP4 files or visit pages containing malicious media content.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires the target to open a malicious file or visit a malicious page, reducing wormable risk but preserving phishing-driven risk.
Researcher notes
The source data identifies MP4 parsing and uninitialized memory access but does not provide exploit details, fixed version data, or normalized CPEs. Validation should focus on version discovery and vendor advisory correlation, not exploit reproduction.
Mitigation direction
- Check Adobe APSB21-101 for the vendor-supported remediation path.
- Prioritize remediation for users who handle external or untrusted media.
- Restrict opening unsolicited MP4 files until affected systems are remediated.
- Use endpoint controls to limit risky file sources where practical.
Validation and detection
- Inventory endpoints with Adobe Premiere Rush installed.
- Confirm whether any installations are version 1.5.16 or earlier.
- Review media-handling workflows for untrusted MP4 exposure.
- Verify remediation status against Adobe APSB21-101 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-824: 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 lookupCVE-2021-43746 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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:N/A:N1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/premiere_rush/apsb21-101.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 Uninitialized Pointer
Access of Uninitialized Pointer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.