Security readout for executives and security teams
Plain-English summary
Adobe FrameMaker can read past intended memory while processing a malicious TIF file. That may expose sensitive memory and help weaken protections like ASLR. The issue requires a user to open the malicious file, so business urgency is lower than remote, no-click vulnerabilities.
Executive priority
Handle through the normal patch cycle unless FrameMaker is widely deployed or used with untrusted publishing assets. Prioritize exposed content-production teams, but this is not an emergency based on the provided evidence.
Technical view
CVE-2021-39834 is a CWE-125 out-of-bounds read in Adobe FrameMaker TIF parsing. Sources list FrameMaker 2019 Update 8 and earlier, and 2020 Release Update 2 and earlier. CVSS 3.0 is 3.3: local vector, low complexity, no privileges, required user interaction, low confidentiality impact only.
Likely exposure
Exposure is likely limited to endpoints running affected Adobe FrameMaker versions, especially users who may open TIF files received from external or untrusted sources.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires user interaction: a victim must open a malicious TIF file. The reported impact is memory disclosure that could assist mitigation bypass, not direct system takeover.
Researcher notes
The bundle supports affected versions, CWE-125 classification, CVSS 3.3, and the malicious TIF user-interaction requirement. It does not provide exploit telemetry, proof-of-concept status, or detailed fixed-version data beyond the Adobe advisory reference.
Mitigation direction
- Review Adobe APSB21-74 and apply the vendor-recommended FrameMaker update.
- Inventory FrameMaker installations and identify affected 2019 and 2020 builds.
- Prioritize users who handle externally supplied TIF files or publishing assets.
- Warn users not to open unexpected TIF files in FrameMaker.
- Use existing endpoint controls to reduce untrusted attachment exposure.
Validation and detection
- Confirm installed FrameMaker versions against the affected version ranges.
- Check patch management records for Adobe APSB21-74 remediation.
- Verify high-risk content teams are not running affected builds.
- Review recent security alerts involving suspicious TIF attachments.
- Document any remaining affected endpoints and compensating controls.
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-125: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-39834 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
- Low
- CVSS
- 3.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
3.3LowVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.