High Severity Use‑After‑Free in Adobe Acrobat (CVE‑2020‑9715) Threatens Document Processing
What It Is
Adobe Acrobat contains a use‑after‑free memory‑corruption flaw that can be triggered by a specially crafted PDF file. Successful exploitation allows an attacker to execute arbitrary code in the context of the user running Acrobat.
Exploitability
The vulnerability has a CVSS 3.1 base score of 8.8 (High). Public proof‑of‑concept code has been released, and multiple threat‑intel reports indicate that the flaw has been leveraged in targeted attacks since its disclosure. Exploits are feasible on any supported Windows, macOS, or Linux version of Acrobat that has not been patched.
Affected Products
- Vendor: Adobe
- Product: Adobe Acrobat (desktop versions) – all releases prior to the security update issued in March 2021.
Why It Matters for Compliance & Audit Readiness
From a control‑assurance perspective, this vulnerability directly impacts access‑control and application‑whitelisting safeguards. Organizations must demonstrate continuous monitoring that only authorized, patched software is allowed to execute. Failure to remediate can be viewed as a lapse in due‑diligence during audits (e.g., ISO 27001, NIST CSF PR.IP‑1) and may erode the evidentiary trail required for a defensible security posture.
Recommended Actions
- Verify the Acrobat version across all endpoints and apply Adobe’s March 2021 security update (or later).
- Update your asset inventory and map the patch to the “Application Hardening” control in your Trust Center.
- Capture screenshots or automated reports showing the patch status as evidence for audit reviews.
- If patching cannot be completed immediately, enforce strict application‑whitelisting or disable Acrobat on high‑risk workstations.
- Incorporate the vulnerability into your continuous vulnerability‑management feed to ensure future remediation cycles are tracked.
Source: CISA KEV – CVE‑2020‑9715