Security readout for executives and security teams
Plain-English summary
Adobe Prelude 10.1 and earlier can be compromised if a user opens a malicious SVG file. Successful exploitation may run attacker-controlled code with that user’s privileges. The main business risk is endpoint compromise through crafted media files, not remote server exposure.
Executive priority
Treat as a high-priority workstation remediation item where Adobe Prelude is installed. Prioritize creative, marketing, and media teams because exploitation depends on opening crafted files.
Technical view
CVE-2021-40775 is a memory corruption flaw in Adobe Prelude SVG parsing. The CVSS 3.0 score is 7.8 with local attack vector, low complexity, no privileges required, and required user interaction. Impact is high for confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to systems running Adobe Prelude 10.1 or earlier, especially workstations where users open SVG or media-related files from external or untrusted sources.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires a victim to open a specially crafted SVG file, so phishing or file-sharing workflows are the likely delivery path.
Researcher notes
Evidence supports arbitrary code execution in the current user context through insecure SVG handling. The bundle identifies CWE-788 and CVSS 7.8. Patch details are not included in the bundle, so remediation should be confirmed directly from Adobe APSB21-96.
Mitigation direction
- Inventory Adobe Prelude installations and identify versions 10.1 or earlier.
- Review Adobe APSB21-96 and apply the vendor-listed update or remediation.
- Restrict opening untrusted SVG files in Prelude until remediation is complete.
- Use endpoint controls to block or quarantine suspicious SVG attachments where practical.
Validation and detection
- Compare installed Prelude versions against the affected range in Adobe APSB21-96.
- Confirm remediated systems no longer report Prelude 10.1 or earlier.
- Review users and workflows that process externally supplied SVG files.
- Check endpoint and mail telemetry for suspicious SVG delivery attempts.
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-2021-40775 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/prelude/apsb21-96.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.