Security readout for executives and security teams
Plain-English summary
CVE-2020-24434 is a low-severity Adobe Acrobat Reader issue where opening a malicious file could expose sensitive memory. The main business risk is not direct system takeover; it is information leakage that may help bypass protections such as ASLR during a broader attack chain.
Executive priority
Treat this as routine endpoint patching, not an emergency. It matters most where Adobe Reader is widely deployed and users regularly handle external PDFs, because the flaw can support a larger attack chain despite low standalone severity.
Technical view
The source bundle describes a CWE-125 out-of-bounds read in Acrobat Reader DC versions 2020.012.20048 and earlier, 2020.001.30005 and earlier, and 2017.011.30175 and earlier. CVSS 3.1 is 3.3 with local attack vector, no privileges required, and required user interaction.
Likely exposure
Exposure is limited to environments still running affected Adobe Acrobat Reader DC versions and where users can be induced to open malicious files. The bundle does not establish server-side or network-reachable exposure.
Exploitation context
The CVE is not listed as KEV in the supplied bundle, and no provided source states active exploitation. Exploitation requires a victim to open a malicious file, and the documented impact is limited confidentiality loss.
Researcher notes
Evidence supports an out-of-bounds read with confidentiality impact only. The bundle notes potential ASLR mitigation bypass, but does not provide proof of active exploitation, public weaponization, or a standalone compromise path. Product naming should be verified against Adobe APSB20-67 before scoping beyond Acrobat Reader.
Mitigation direction
- Inventory Acrobat Reader DC versions across managed endpoints.
- Check Adobe APSB20-67 for vendor update guidance.
- Update or remove affected Acrobat Reader installations.
- Use attachment filtering and user controls for untrusted PDFs.
- Prioritize systems handling sensitive documents or external attachments.
Validation and detection
- Confirm endpoints are not running listed affected versions.
- Verify patch status against Adobe APSB20-67 guidance.
- Review software inventory for unsupported 2017 or 2020 builds.
- Check email and web controls for malicious file delivery risk.
- Document residual exposure where updates are delayed.
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
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-2020-24434 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-20-1356/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.
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.