CVE-2025-14407: Soda PDF Memory Corruption Vulnerability

CVE-2025-14407 Overview

CVE-2025-14407 is a memory corruption information disclosure vulnerability in Soda PDF Desktop. The flaw resides in the application's PDF file parsing logic and stems from insufficient validation of user-supplied data [CWE-119]. A local attacker can trigger the condition by convincing a user to open a crafted PDF file or visit a malicious page that delivers one. Successful exploitation discloses sensitive process memory and can be chained with other vulnerabilities to achieve arbitrary code execution in the context of the current process. The Zero Day Initiative tracked the issue as ZDI-CAN-27141 and published advisory ZDI-25-1080.

Critical Impact
Attackers can leak sensitive in-process memory from Soda PDF Desktop and chain the flaw with other bugs to run arbitrary code as the current user.

Affected Products

Soda PDF Desktop 14.0.509.23030
Sodapdf Soda PDF (desktop client)
Systems where users open untrusted PDF documents with Soda PDF Desktop

Discovery Timeline

2025-12-23 - CVE-2025-14407 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-14407

Vulnerability Analysis

The vulnerability resides in the PDF parsing routines of Soda PDF Desktop. When the application processes attacker-controlled PDF structures, it fails to properly validate user-supplied data before operating on memory buffers. This triggers a memory corruption condition classified under [CWE-119] (Improper Restriction of Operations within the Bounds of a Memory Buffer).

The direct consequence is information disclosure. Corrupted memory operations expose data from adjacent regions of the process heap or stack, which may contain document contents, credentials, tokens, or pointers. Attackers commonly pair such primitives with control-flow bugs to defeat ASLR and pivot to code execution within the Soda PDF process context.

The attack requires local access and user interaction. A victim must open a malicious PDF or navigate to a page that delivers one. No authentication or elevated privileges are required for the attacker to craft the payload.

Root Cause

The root cause is the absence of proper bounds and structural validation on values read from PDF file streams. Malformed object sizes, indices, or embedded data are consumed by parsing routines and used to compute offsets or lengths without sanity checks. The resulting out-of-bounds access corrupts memory and leaks information back to attacker-controlled parsing paths.

Attack Vector

An attacker crafts a PDF containing malformed object structures that trigger the parser flaw. The file is delivered by email attachment, download link, or embedded in a webpage. When the target opens the document in Soda PDF Desktop version 14.0.509.23030, the parser processes the malicious structures and discloses memory. Attackers can automate extraction and combine the leak with a secondary bug to escalate to remote code execution.

No verified public exploit code is available for CVE-2025-14407. Refer to the Zero Day Initiative advisory ZDI-25-1080 for additional technical context.

Detection Methods for CVE-2025-14407

Indicators of Compromise

Unexpected crashes or exception events involving the Soda PDF Desktop process shortly after opening a PDF document
PDF files with malformed object dictionaries, invalid cross-reference tables, or anomalous stream lengths delivered via email or web downloads
Soda PDF processes spawning unusual child processes such as command shells or script interpreters
Outbound network connections initiated by the Soda PDF Desktop process to unfamiliar hosts following document open events

Detection Strategies

Alert on Soda PDF Desktop process crashes and Windows Error Reporting entries tied to SodaPDF.exe version 14.0.509.23030
Inspect PDF files at the mail and web gateway for malformed structures using dedicated PDF parsers
Correlate PDF open events with subsequent process creation and network telemetry to identify chained exploitation attempts

Monitoring Recommendations

Track execution of SodaPDF.exe and monitor for anomalous memory access patterns and unexpected module loads
Log user-initiated file open events for PDF documents originating from untrusted sources
Retain endpoint telemetry from PDF viewer processes for retrospective threat hunting when new exploit details become public

How to Mitigate CVE-2025-14407

Immediate Actions Required

Inventory endpoints running Soda PDF Desktop 14.0.509.23030 and prioritize them for remediation
Apply the vendor patch as soon as Sodapdf publishes a fixed release addressing ZDI-25-1080
Instruct users to avoid opening PDF files from untrusted email senders or unknown websites until patched
Route PDF attachments through gateway-level scanning and sandbox detonation before delivery

Patch Information

At the time of publication, no vendor advisory URL is listed in the NVD record. Consult the Zero Day Initiative advisory ZDI-25-1080 and the Sodapdf support portal for the current patched build. Upgrade all instances of Soda PDF Desktop 14.0.509.23030 to the fixed version once released.

Workarounds

Use an alternate PDF reader configured with sandboxing until a patched Soda PDF Desktop build is available
Enforce application allowlisting to restrict which users can execute Soda PDF Desktop on sensitive workstations
Disable PDF file associations for Soda PDF Desktop and open untrusted documents inside an isolated virtual machine or browser sandbox
Block delivery of PDF attachments from external senders where business processes allow

bash

# Configuration example: remove Soda PDF as the default PDF handler on Windows
# and enforce opening PDFs in a browser sandbox instead
reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice" /f
ftype SodaPDF.Document="C:\Program Files\Google\Chrome\Application\chrome.exe" "%1"