Security readout for executives and security teams
Plain-English summary
A malicious PDF could make vulnerable Adobe Acrobat Reader DC run attacker-controlled code as the person who opens it. The business risk is highest where users routinely receive PDFs from email, portals, or external partners. Exploitation requires a user to open a malicious file; the bundle does not show known active exploitation.
Executive priority
Prioritize routine patching with elevated urgency for PDF-heavy teams. This is high impact if exploited, but the evidence requires user interaction and does not show active exploitation in the supplied sources.
Technical view
CVE-2020-24437 is a CWE-416 use-after-free in Acrobat Reader DC Format event action processing. Affected branches include 2020.012.20048 and earlier, 2020.001.30005 and earlier, and 2017.011.30175 and earlier. CVSS 3.1 is 7.8 with local attack vector and required user interaction.
Likely exposure
Exposure is likely on endpoints running older Acrobat Reader DC builds, especially where PDFs from untrusted sources are opened. Servers are not the main concern unless they host interactive user sessions or automated PDF handling using affected Reader versions.
Exploitation context
The supplied evidence says exploitation requires opening a malicious file. KEV status is false, and the bundle provides no cited evidence of active exploitation. Treat it as a phishing and document-delivery risk rather than a remote, no-click service exposure.
Researcher notes
Talos and Adobe are the key technical references. The supplied bundle does not include fixed build numbers or exploit-in-the-wild evidence, so validation should focus on version inventory, vendor advisory review, and suspicious Reader process activity after PDF opens.
Mitigation direction
- Review Adobe APSB20-67 and deploy the vendor-fixed Acrobat Reader DC update.
- Prioritize users who receive external PDFs or handle customer-submitted documents.
- Remove or isolate affected Reader versions where immediate updating is not possible.
- Use endpoint and email controls to reduce delivery of suspicious PDF attachments.
Validation and detection
- Inventory Acrobat Reader DC versions across managed endpoints.
- Flag builds at or below 2020.012.20048, 2020.001.30005, or 2017.011.30175.
- Confirm updated endpoints no longer report affected Reader branches.
- Review EDR and email telemetry for suspicious PDF-driven Reader activity.
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-416: 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-2020-24437 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/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/acrobat/apsb20-67.htmlCVE reference · x_refsource_MISC
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1156CVE 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.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.