Security readout for executives and security teams
Plain-English summary
CVE-2020-9715 is a memory safety flaw in older Adobe Acrobat and Reader versions. If a user opens a malicious PDF, an attacker could run code on that workstation. CISA KEV lists it as known exploited, so remaining affected installations should be treated as business-relevant endpoint risk.
Executive priority
Prioritize remediation where affected Adobe PDF software remains installed. The vulnerability requires user interaction, but KEV status means attackers have exploited it in the wild, making patch completion and legacy software removal important.
Technical view
The issue is a CWE-416 use-after-free vulnerability in Adobe Acrobat and Reader affecting listed 2020, 2017, and 2015 builds. CVSS 3.1 is 7.8 with low complexity, no privileges required, user interaction required, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely on endpoints still running Adobe Acrobat or Reader at or below the affected builds, especially where users handle external PDFs. Unsupported or unmanaged desktop software inventories increase uncertainty.
Exploitation context
Active exploitation is supported by CISA KEV. The provided sources do not describe current campaign scope, affected sectors, or whether exploitation is widespread today.
Researcher notes
ZDI and Exodus identify this as a use-after-free leading to code execution. Keep validation defensive: version checks, patch confirmation, and telemetry review. The bundle does not provide safe detection indicators or current exploit prevalence.
Mitigation direction
- Inventory Adobe Acrobat and Reader versions across managed endpoints.
- Apply Adobe APSB20-48 updates or later vendor-supported releases.
- Prioritize systems handling external or unsolicited PDF files.
- Remove unsupported Acrobat or Reader versions where no longer needed.
- Use vendor guidance for any compensating controls.
Validation and detection
- Compare installed versions against the affected version ranges in the CVE record.
- Confirm patched systems report a vendor-supported Acrobat or Reader build.
- Review software inventory for 2015, 2017, and affected 2020 tracks.
- Check endpoint telemetry for suspicious PDF-driven process activity.
- Document exceptions and compensating controls for unpatched systems.
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-2020-9715 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
- Yes
- 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.
CISA KEV status
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://www.zerodayinitiative.com/advisories/ZDI-20-991/CVE reference
- https://helpx.adobe.com/security/products/acrobat/apsb20-48.htmlCVE reference
- https://blog.exodusintel.com/2021/04/20/analysis-of-a-use-after-free-vulnerability-in-adobe-acrobat-reader-dc/CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9715CVE reference · government-resource
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.