Security readout for executives and security teams
Plain-English summary
Adobe Prelude 22.1.1 and earlier can mishandle a malicious file, letting code run as the signed-in user. Exploitation requires user interaction, so the business risk is highest for staff who open externally supplied media files.
Executive priority
Address in the normal high-severity desktop patch cycle, with faster handling for teams that regularly receive external media files. This is not evidenced as actively exploited in the provided sources.
Technical view
CVE-2021-43754 is a CWE-787 out-of-bounds write in Adobe Prelude file handling. The CVSS 3.1 score is 7.8 with local attack vector, low complexity, no privileges required, and required user interaction. Successful exploitation may affect confidentiality, integrity, and availability.
Likely exposure
Exposure is likely limited to workstations with Adobe Prelude 22.1.1 or earlier installed, especially creative, marketing, media, or production teams handling files from outside parties.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. Attackers would need a user to open a malicious file, and code would run in that user’s context.
Researcher notes
The provided record identifies the weakness class and impact but does not include file formats, crash details, exploit primitives, or proof-of-concept evidence. Avoid assuming broader Adobe product exposure without vendor confirmation.
Mitigation direction
- Check Adobe APSB21-114 for the vendor-supported fixed version and remediation guidance.
- Prioritize updating or removing Adobe Prelude on exposed creative workstations.
- Limit opening of untrusted media/project files until remediation is confirmed.
- Use least-privilege user accounts on systems running Prelude.
- Route externally supplied files through existing malware scanning and review workflows.
Validation and detection
- Inventory endpoints for Adobe Prelude installations and versions.
- Treat Adobe Prelude 22.1.1 and earlier as affected.
- Confirm remediation status against Adobe APSB21-114.
- Review security telemetry for unusual Prelude process behavior after opening external files.
- Verify creative teams understand restrictions on untrusted files until patched.
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-2021-43754 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/prelude/apsb21-114.htmlCVE reference · vendor-advisory
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.