CVE-2025-61837 Overview
CVE-2025-61837 is a heap-based buffer overflow vulnerability in Adobe Format Plugins versions 1.1.1 and earlier. Successful exploitation allows arbitrary code execution in the context of the current user. The flaw maps to [CWE-122] Heap-based Buffer Overflow and [CWE-787] Out-of-bounds Write. Exploitation requires user interaction, where a victim must open a malicious file crafted to trigger the overflow. Adobe addressed the issue in Security Advisory APSB25-114.
Critical Impact
An attacker who convinces a user to open a malicious file can execute arbitrary code with the privileges of the current user, leading to full compromise of the user account.
Affected Products
- Adobe Format Plugins 1.1.1
- Adobe Format Plugins prior to 1.1.1
- Workflows that load Adobe Format Plugins into host applications
Discovery Timeline
- 2025-11-11 - CVE-2025-61837 published to NVD
- 2025-11-13 - Last updated in NVD database
Technical Details for CVE-2025-61837
Vulnerability Analysis
The vulnerability is a heap-based buffer overflow in Adobe Format Plugins. The component parses externally supplied file format data and writes beyond the bounds of a heap-allocated buffer during processing. The out-of-bounds write corrupts adjacent heap structures, including object metadata or function pointers used during file handling. An attacker who controls the malformed input can shape the overflow to redirect execution flow. Because exploitation depends on a victim opening a malicious file, attackers will typically deliver crafted files through email, file shares, or web downloads.
Root Cause
The root cause is improper validation of size or length values during parsing of an attacker-controlled file format. The plugin allocates a heap buffer based on assumed input constraints, then copies or decodes data without verifying that the destination buffer is large enough. This mismatch produces an out-of-bounds write classified as [CWE-787], on top of the heap overflow primitive captured by [CWE-122].
Attack Vector
The attack vector is local and requires user interaction. The attacker delivers a malicious file designed to load through Adobe Format Plugins. When the victim opens the file in a host application that invokes the affected plugin, the parser triggers the heap overflow. Successful exploitation yields arbitrary code execution under the current user's privileges, with no elevation required for impact within that user context.
No verified public exploit code is available for CVE-2025-61837 at the time of writing. Technical specifics on the affected parsing routine are restricted to the Adobe Security Advisory APSB25-114.
Detection Methods for CVE-2025-61837
Indicators of Compromise
- Unexpected child processes spawned by host applications that load Adobe Format Plugins after a user opens a file.
- Crashes or access violations in the plugin module recorded in Windows Error Reporting or application event logs.
- Inbound files with format-plugin-handled extensions arriving from untrusted external sources, especially via email attachments or web downloads.
- Outbound network connections initiated by the host application immediately after opening a third-party file.
Detection Strategies
- Monitor process telemetry for the host application loading Adobe Format Plugins and flag anomalous post-load activity such as shell, scripting, or LOLBin execution.
- Hunt for heap corruption artifacts in crash dumps tied to the format plugin module on systems still running version 1.1.1 or earlier.
- Correlate file-open events on user endpoints with subsequent persistence or credential-access behavior.
Monitoring Recommendations
- Enable command-line and image-load logging on endpoints that run Adobe products which consume Format Plugins.
- Track the deployed version of Adobe Format Plugins across the fleet and alert when versions at or below 1.1.1 are observed.
- Review email and web gateway telemetry for delivery of file types parsed by the affected plugin.
How to Mitigate CVE-2025-61837
Immediate Actions Required
- Apply the update referenced in Adobe Security Advisory APSB25-114 to all systems running Adobe Format Plugins 1.1.1 or earlier.
- Inventory endpoints and build systems for installations of format_plugins and prioritize patching for users who handle external files.
- Instruct users not to open Adobe-format files from untrusted sources until the patch is deployed.
Patch Information
Adobe published the fix in Security Advisory APSB25-114. Administrators should follow the upgrade guidance in the Adobe Security Advisory APSB25-114 to obtain the updated Format Plugins release that resolves the heap-based buffer overflow.
Workarounds
- Restrict the file types processed by Adobe Format Plugins at the email and web gateway until patching is complete.
- Run host applications under standard user accounts and enforce application allowlisting to limit post-exploitation impact.
- Disable or remove the affected plugin on systems that do not require it.
# Configuration example
# Identify Adobe Format Plugins installations on Windows endpoints
Get-ChildItem -Path 'C:\Program Files\Adobe' -Recurse -Filter '*format*plugin*' -ErrorAction SilentlyContinue |
Select-Object FullName, LastWriteTime
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
