CVE-2025-54257 Overview
CVE-2025-54257 is a Use After Free vulnerability [CWE-416] affecting Adobe Acrobat and Acrobat Reader. The flaw impacts versions 24.001.30254, 20.005.30774, 25.001.20672, and earlier across both Windows and macOS platforms. An attacker can achieve arbitrary code execution in the context of the current user by convincing a victim to open a crafted PDF file. Adobe addressed the issue in security advisory APSB25-85.
Critical Impact
Successful exploitation leads to arbitrary code execution with the privileges of the user running Acrobat Reader. Attackers can use this foothold to install malware, steal data, or pivot deeper into the host.
Affected Products
- Adobe Acrobat DC (Continuous track) versions 24.001.30254 and earlier
- Adobe Acrobat Reader DC (Continuous track) versions 25.001.20672 and earlier
- Adobe Acrobat and Acrobat Reader (Classic track) versions 20.005.30774 and earlier on Windows and macOS
Discovery Timeline
- 2025-09-09 - CVE-2025-54257 published to NVD
- 2025-11-03 - Last updated in NVD database
Technical Details for CVE-2025-54257
Vulnerability Analysis
The vulnerability is a Use After Free condition within Acrobat Reader's PDF parsing logic. The application frees a memory object but retains a reference to it. Subsequent operations dereference that stale pointer, allowing an attacker to control program flow.
Exploitation requires local user interaction. A victim must open a malicious PDF, typically delivered through email, instant messaging, or a drive-by download. Because the CVSS scope is unchanged, code executes with the privileges of the targeted user rather than crossing a privilege boundary.
Acrobat Reader is a high-value target due to its install base across enterprise endpoints. Use After Free flaws in PDF readers have historically been chained with sandbox escapes to achieve full system compromise. The Talos Intelligence advisory TALOS-2025-2222 provides additional technical context on the affected component.
Root Cause
The defect originates in object lifetime management within Acrobat's document processing engine. When a specific sequence of PDF operations executes, an internal object is released while a dangling reference remains accessible. Attackers craft PDF structures that trigger reuse of the freed allocation, replacing it with attacker-controlled data before the stale pointer is dereferenced.
Attack Vector
The attack vector is local and requires user interaction. The attacker delivers a malicious PDF and convinces the target to open it in a vulnerable version of Acrobat or Acrobat Reader. No authentication or elevated privileges are required on the target system. Once the PDF is rendered, the Use After Free is triggered during parsing or object processing, redirecting execution to attacker-controlled code.
No public proof-of-concept exploit is currently available, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2025-54257
Indicators of Compromise
- Unexpected child processes spawned by Acrobat.exe or AcroRd32.exe, such as cmd.exe, powershell.exe, or wscript.exe
- PDF files arriving from untrusted email senders or unknown external sources, especially with obfuscated JavaScript or embedded streams
- Acrobat Reader crashes or unexpected restarts coinciding with PDF opens, which may indicate failed exploitation attempts
Detection Strategies
- Monitor process creation telemetry for Acrobat processes launching scripting interpreters or LOLBins
- Inspect PDF documents for anomalous object streams, JavaScript actions, and malformed cross-reference tables
- Correlate user-opened PDF events with subsequent outbound network connections from Acrobat processes
Monitoring Recommendations
- Forward endpoint EDR telemetry to a centralized analytics platform for cross-host correlation of Acrobat exploitation patterns
- Alert on writes to autostart locations or scheduled task creation by Acrobat process trees
- Track Acrobat Reader version inventory across managed endpoints to identify hosts running vulnerable builds
How to Mitigate CVE-2025-54257
Immediate Actions Required
- Apply the Adobe APSB25-85 update to bring Acrobat and Acrobat Reader to a patched build across all Windows and macOS endpoints
- Identify and prioritize patching on systems where users routinely open PDFs from external senders
- Enforce Protected View and Protected Mode (sandbox) settings via group policy to constrain exploitation impact
Patch Information
Adobe released fixed versions in Adobe Security Advisory APSB25-85. Administrators should deploy the updated builds for both the Continuous and Classic tracks. Additional technical detail is available in the Talos Intelligence Vulnerability Report TALOS-2025-2222.
Workarounds
- Configure Acrobat Reader to disable JavaScript execution in PDFs via the Preferences panel where business workflows permit
- Block inbound PDF attachments from untrusted external senders at the email gateway or detonate them in a sandbox prior to delivery
- Associate PDF files with a non-vulnerable viewer or a hardened browser-based renderer until patching is complete
# Windows registry example: disable JavaScript in Acrobat Reader DC
reg add "HKCU\Software\Adobe\Acrobat Reader\DC\JSPrefs" /v bEnableJS /t REG_DWORD /d 0 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
