CVE-2026-47925 Overview
CVE-2026-47925 is an integer overflow or wraparound vulnerability [CWE-190] affecting Adobe Acrobat Reader versions 24.001.30365, 26.001.21651, and earlier. The flaw allows an attacker to trigger an application denial-of-service condition by causing the program to crash. Exploitation requires user interaction: a victim must open a malicious file crafted to trigger the overflow. The vulnerability impacts availability only and does not lead to information disclosure or code execution.
Critical Impact
An attacker can crash Adobe Acrobat Reader on a victim's machine by delivering a malicious file, resulting in loss of application availability.
Affected Products
- Adobe Acrobat Reader version 24.001.30365
- Adobe Acrobat Reader version 26.001.21651
- Adobe Acrobat Reader earlier versions in both release branches
Discovery Timeline
- 2026-06-09 - CVE-2026-47925 published to NVD
- 2026-06-10 - Last updated in NVD database
Technical Details for CVE-2026-47925
Vulnerability Analysis
The vulnerability is classified as an Integer Overflow or Wraparound [CWE-190]. Acrobat Reader performs arithmetic on values parsed from a document without enforcing bounds appropriate to the destination data type. When a crafted value exceeds the maximum representable size, the computation wraps around, producing an incorrect, undersized result.
The miscalculated value is then used in downstream memory operations or control logic. The mismatch causes the application to dereference invalid memory or to take an unrecoverable code path, terminating the process. The result is a denial-of-service condition affecting only the local user's Acrobat Reader session.
The scope is unchanged and the vulnerability impacts availability only. Confidentiality and integrity are not affected, and no privilege boundaries are crossed within the host.
Root Cause
The root cause is missing or insufficient validation of arithmetic operations on attacker-controlled values inside a parsed document. Adobe has not published low-level technical details for this issue in the public advisory.
Attack Vector
The attack vector is local and requires user interaction. An attacker must deliver a malicious file — typically a crafted PDF — to a victim through phishing, a shared file location, or a malicious download. The victim must open the file in a vulnerable version of Acrobat Reader to trigger the crash.
No verified exploit code or public proof-of-concept is available at the time of publication. Refer to the Adobe Acrobat Security Advisory APSB26-63 for vendor technical details.
Detection Methods for CVE-2026-47925
Indicators of Compromise
- Unexpected AcroRd32.exe or Acrobat.exe process crashes correlated with the opening of a PDF document
- Windows Application event log entries showing faulting Acrobat Reader modules following document open events
- Inbound PDF attachments from untrusted senders that consistently cause Reader to terminate on open
Detection Strategies
- Monitor endpoint telemetry for repeated crash events from Acrobat Reader processes initiated by document handlers
- Inspect email gateways and web proxies for PDF files originating from low-reputation sources and correlate with downstream crashes
- Track installed Acrobat Reader versions across the fleet and flag hosts running 24.001.30365, 26.001.21651, or earlier
Monitoring Recommendations
- Enable process crash and exception logging on endpoints to capture Acrobat Reader termination events
- Forward Acrobat Reader telemetry to a central SIEM or data lake for correlation with file delivery events
- Alert on bursts of Acrobat Reader crashes across multiple users, which may indicate a targeted malicious-document campaign
How to Mitigate CVE-2026-47925
Immediate Actions Required
- Apply the security update referenced in Adobe advisory APSB26-63 to all systems running Acrobat Reader
- Inventory endpoints for vulnerable versions 24.001.30365, 26.001.21651, and earlier, and prioritize patching
- Block or quarantine PDF attachments from untrusted external senders pending patch deployment
Patch Information
Adobe has released fixed versions of Acrobat Reader as documented in the Adobe Acrobat Security Advisory APSB26-63. Administrators should deploy the vendor-supplied update through their standard software distribution mechanism and verify version numbers post-deployment.
Workarounds
- Enable Protected View in Acrobat Reader to restrict the behavior of documents opened from untrusted locations
- Use an alternative PDF reader for handling files from external or unverified sources until patches are deployed
- Apply email and web filtering policies to strip or sandbox PDF attachments from unknown senders
# Configuration example: enable Protected View for all files via Windows registry
reg add "HKCU\Software\Adobe\Acrobat Reader\DC\FeatureLockDown" /v iProtectedView /t REG_DWORD /d 2 /f
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
