Security readout for executives and security teams
Plain-English summary
CVE-2021-39830 affects Adobe FrameMaker when it handles a malicious PDF file. If a user opens the crafted file, code could run with that user's privileges. This is primarily an endpoint and document-handling risk, not a remotely reachable server flaw.
Executive priority
Treat this as a high-priority workstation remediation item where FrameMaker is used. The business risk comes from malicious document handling and potential code execution, especially for staff who receive external PDFs.
Technical view
Adobe FrameMaker 2019 Update 8 and earlier, and 2020 Release Update 2 and earlier, contain a PDF parsing memory corruption vulnerability. The CVSS 3.0 score is 7.8 with local attack vector, low complexity, no privileges required, and required user interaction. The listed weakness is CWE-788.
Likely exposure
Exposure is likely limited to systems where vulnerable Adobe FrameMaker versions are installed and users open untrusted PDFs. Organizations using FrameMaker in documentation, publishing, engineering, or regulated-content workflows should prioritize inventory checks.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not listed as KEV. Exploitation requires user interaction: a victim must open a malicious PDF in vulnerable FrameMaker. Successful exploitation could affect confidentiality, integrity, and availability for that user context.
Researcher notes
Evidence is limited to the CVE record and Adobe advisory reference. Do not assume exploitation in the wild from the provided bundle. Validation should focus on installed FrameMaker versions, user document workflows, and whether Adobe's APSB21-74 remediation has been applied.
Mitigation direction
- Identify FrameMaker installations and versions across managed endpoints.
- Review Adobe APSB21-74 for vendor update guidance.
- Upgrade vulnerable FrameMaker builds to a non-affected vendor-supported release.
- Restrict opening PDFs from untrusted sources in FrameMaker until remediated.
- Use endpoint controls to reduce impact of user-context code execution.
Validation and detection
- Confirm whether FrameMaker 2019 Update 8 or earlier is installed.
- Confirm whether FrameMaker 2020 Release Update 2 or earlier is installed.
- Verify Adobe APSB21-74 has been reviewed by vulnerability management.
- Validate remediated endpoints report a non-affected FrameMaker build.
- Check EDR and email security logs for suspicious PDF delivery patterns.
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-2021-39830 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/framemaker/apsb21-74.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.