Security readout for executives and security teams
Plain-English summary
Adobe Prelude 10.0 and earlier can be compromised if a user opens a maliciously crafted file. Successful exploitation could run attacker-controlled code with that user's privileges, risking data theft, tampering, or disruption on affected workstations.
Executive priority
Treat as high priority for creative or media teams using Adobe Prelude. The business risk depends on installed footprint and exposure to untrusted files, not internet-facing reachability.
Technical view
CVE-2021-35999 is a CWE-788 memory corruption issue in Adobe Prelude file parsing. CVSS 3.1 is 7.8 with local attack vector, low complexity, no privileges required, and user interaction required. Impact is high for confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to systems with Adobe Prelude 10.0 or earlier installed, particularly users who open files from external or untrusted sources. This is not described as a remotely reachable network service issue.
Exploitation context
An unauthenticated attacker must persuade a victim to open a malicious file. The source bundle does not show CISA KEV listing or other cited evidence of active exploitation.
Researcher notes
Key evidence supports memory corruption during crafted file parsing, arbitrary code execution as the current user, and required user interaction. The bundle does not include exploit details, patch version details, or active exploitation evidence.
Mitigation direction
- Review Adobe APSB21-58 for the vendor-provided remediation.
- Update or remove Adobe Prelude 10.0 and earlier where affected.
- Limit opening Prelude files from untrusted or unexpected sources.
- Use least-privilege user accounts on creative workstations.
- Prioritize controls for users handling external media files.
Validation and detection
- Inventory endpoints for Adobe Prelude installations and versions.
- Identify systems running Adobe Prelude 10.0 or earlier.
- Confirm Adobe APSB21-58 remediation status for affected hosts.
- Review security telemetry for suspicious activity after file opens.
- Validate user workflows for untrusted file handling.
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-2021-35999 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/apsb21-58.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.