Security readout for executives and security teams
Plain-English summary
This is a low-severity Adobe Acrobat Reader DC flaw where opening a malicious file could leak memory address information. It does not indicate code execution, system takeover, or data modification in the supplied sources, but it still matters on endpoints that handle untrusted documents.
Executive priority
Treat as routine patching unless many users process untrusted PDFs or patching is significantly delayed. It is not presented as actively exploited in the supplied sources.
Technical view
CVE-2020-24438 is a CWE-416 use-after-free issue in Acrobat Reader DC. A malicious file opened by a user could trigger information disclosure through a memory address leak. The CVSS 3.1 score is 3.3 with local attack vector and required user interaction.
Likely exposure
Exposure is mainly desktop endpoints running Acrobat Reader DC 2020.012.20048 or earlier, 2020.001.30005 or earlier, or 2017.011.30175 or earlier.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. Exploitation requires convincing a user to open a malicious file, so email, web downloads, and shared documents are the realistic delivery paths.
Researcher notes
Evidence supports information disclosure only, specifically a memory address leak, with user interaction required. Do not infer remote code execution, broad Acrobat impact, or exploitation in the wild from this bundle alone.
Mitigation direction
- Update Acrobat Reader DC according to Adobe APSB20-67 guidance.
- Prioritize systems that open external or customer-supplied documents.
- Limit opening of untrusted PDF files where practical.
- Use email and web controls to reduce malicious file delivery.
- Check vendor guidance if legacy Reader tracks remain in use.
Validation and detection
- Inventory Acrobat Reader DC versions across managed endpoints.
- Flag versions at or below the affected builds listed for each track.
- Confirm patched hosts no longer report vulnerable Reader versions.
- Review document-handling endpoints with higher exposure first.
- Check whether security tooling detects suspicious PDF delivery attempts.
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
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CWE-416: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-24438 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/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/acrobat/apsb20-67.htmlCVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-20-1357/CVE 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.