Security readout for executives and security teams
Plain-English summary
This vulnerability affects Adobe FrameMaker when it handles a malicious PDF file. If a user opens such a file, an attacker could run code with that user’s privileges. It is serious for organizations that use FrameMaker with externally supplied files, but it requires user interaction and is not described as a server-side exposure.
Executive priority
Treat this as a high-priority workstation remediation item where FrameMaker is used in document production or customer-facing file workflows. It is not described as actively exploited in the supplied evidence, but arbitrary code execution through document handling can support malware deployment or data compromise.
Technical view
CVE-2021-39832 is a memory corruption flaw in Adobe FrameMaker PDF file parsing, mapped to CWE-788. The listed affected versions are FrameMaker 2019 Update 8 and earlier, and 2020 Release Update 2 and earlier. CVSS 3.0 is 7.8 with local attack vector, low complexity, no privileges, and required user interaction.
Likely exposure
Exposure is likely limited to endpoints or publishing workstations with affected Adobe FrameMaker versions installed. Risk increases where users process PDFs from customers, vendors, email, shared drives, or other untrusted sources.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires a malicious PDF and user interaction, but successful exploitation could provide code execution in the current user context with high confidentiality, integrity, and availability impact.
Researcher notes
Evidence supports a file-parsing memory corruption issue requiring user interaction. The source bundle does not provide exploit maturity, proof-of-concept status, or detailed fixed build information beyond the Adobe bulletin reference. Avoid assuming exposure outside Adobe FrameMaker or claiming active exploitation without additional evidence.
Mitigation direction
- Review Adobe APSB21-74 and apply vendor-recommended FrameMaker updates.
- Inventory FrameMaker installations and prioritize affected 2019 and 2020 builds.
- Restrict opening untrusted PDFs in FrameMaker until remediation is complete.
- Use least-privileged user accounts on systems running FrameMaker.
- Route externally supplied PDFs through established malware scanning workflows.
Validation and detection
- Confirm installed FrameMaker versions across managed endpoints.
- Check whether any installs are 2019 Update 8 or earlier.
- Check whether any installs are 2020 Release Update 2 or earlier.
- Verify remediation status against Adobe APSB21-74 guidance.
- Review file-handling workflows for untrusted PDF exposure.
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-2021-39832 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.