Security readout for executives and security teams
Plain-English summary
CVE-2020-24427 is a low-severity Adobe Acrobat Reader issue where opening a malicious file can expose sensitive memory. The main business concern is not direct system takeover, but information leakage that could help bypass protections such as ASLR when combined with other flaws.
Executive priority
Treat this as routine patch management, not an emergency, unless vulnerable Reader versions are widespread among users handling external documents. It deserves timely remediation because memory disclosure can help attackers chain vulnerabilities despite the low standalone severity.
Technical view
Affected Acrobat Reader versions have an input validation flaw while decoding a crafted codec. Successful exploitation requires local user interaction and can disclose limited memory. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N, indicating confidentiality impact only.
Likely exposure
Exposure is likely limited to endpoints running affected Acrobat Reader release tracks: 2020.012.20048 and earlier, 2020.001.30005 and earlier, or 2017.011.30175 and earlier. Systems where users open untrusted PDFs or document attachments carry the most practical risk.
Exploitation context
The provided sources do not show CISA KEV listing or confirmed active exploitation. Exploitation requires a victim to open a malicious file. The disclosed memory could support mitigation bypass in a broader exploit chain, but this CVE alone is described as information disclosure.
Researcher notes
Evidence supports CWE-20 input validation weakness, local attack vector, required user interaction, and limited confidentiality impact. No source in the bundle provides exploit availability or detailed fixed-version data beyond the Adobe advisory reference, so remediation should be anchored to APSB20-67.
Mitigation direction
- Review Adobe APSB20-67 for vendor-approved update guidance.
- Upgrade Acrobat Reader beyond the affected versions listed in the CVE.
- Restrict opening untrusted PDF or document attachments where feasible.
- Use email and web filtering to reduce malicious file delivery.
- Prioritize managed endpoints with frequent external document handling.
Validation and detection
- Inventory Acrobat Reader versions across managed endpoints.
- Compare installed versions against the affected version thresholds.
- Confirm Adobe APSB20-67 guidance is applied in patch tooling.
- Check whether high-risk users can open external document attachments.
- Record exceptions where legacy Reader versions must remain installed.
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
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Open ATT&CK lookupCVE-2020-24427 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
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.