Security readout for executives and security teams
Plain-English summary
This Acrobat Reader issue can let a maliciously modified, certified PDF run JavaScript as the user who opens it. It is not a drive-by server flaw: the attacker needs a trusted certified PDF, must modify it, and must persuade the victim to open it. Business risk is mainly targeted document-based attacks against users with affected Acrobat versions.
Executive priority
Treat this as a targeted endpoint risk, not an internet-facing emergency. Patch affected Acrobat installations through normal endpoint management, prioritizing teams that handle certified PDFs and external document workflows. Lack of KEV evidence lowers urgency, but the potential user-context impact justifies timely remediation.
Technical view
CWE-20 improper input validation affects Acrobat Reader DC 2020.012.20048 and earlier, 2020.001.30005 and earlier, 2017.011.30175 and earlier, and Acrobat Pro DC 2017.011.30175 and earlier. CVSS 3.1 is 6.7 with local attack vector, high complexity, low privileges, and required user interaction. Impact flags are high for confidentiality, integrity, and availability.
Likely exposure
Exposure exists where endpoints still run affected Adobe Acrobat Reader or Acrobat Pro DC versions and users open trusted certified PDFs. Risk is higher for organizations that routinely exchange certified PDFs with customers, partners, legal, finance, or regulated workflow participants.
Exploitation context
The source bundle does not show active exploitation, and this CVE is not marked KEV. Exploitation requires a trusted certified PDF, attacker modification of that document, and victim interaction. That makes broad automated exploitation less likely, but targeted document attacks remain credible.
Researcher notes
Evidence is limited to CVE data and Adobe's advisory reference. The key constraint is the certified-PDF trust requirement, which materially raises exploit complexity. Do not assume arbitrary PDF opening is sufficient unless vendor or exploit evidence states that. Validate exposure by version and workflow, not product presence alone.
Mitigation direction
- Apply Adobe's APSB20-67 security update guidance for Acrobat and Acrobat Reader.
- Inventory endpoints for the affected Acrobat Reader and Acrobat Pro DC versions.
- Prioritize users who regularly handle certified PDFs from external parties.
- Review PDF trust and JavaScript settings against Adobe guidance.
- Use endpoint protection controls for suspicious PDF behavior where available.
Validation and detection
- Confirm installed Acrobat and Reader versions are newer than affected releases.
- Verify APSB20-67 remediation is deployed across managed endpoints.
- Check whether certified PDF workflows depend on vulnerable client versions.
- Review security telemetry for suspicious Acrobat JavaScript activity.
- Document exceptions where legacy Acrobat versions remain in use.
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-20: 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 lookupCVE-2020-24432 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
- Medium
- CVSS
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/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:H/PR:L/UI:R/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/acrobat/apsb20-67.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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.