CVE-2024-39386: Adobe Bridge RCE Vulnerability

CVE-2024-39386 Overview

CVE-2024-39386 is an out-of-bounds write vulnerability [CWE-787] affecting Adobe Bridge versions 13.0.8, 14.1.1 and earlier. The flaw allows arbitrary code execution in the context of the current user when a victim opens a malicious file. Adobe published the issue on August 14, 2024, in security bulletin APSB24-59. The vulnerability affects Adobe Bridge deployments on both Microsoft Windows and Apple macOS platforms.

Exploitation requires user interaction, but successful execution grants attackers the same privileges as the logged-in user. On systems where Bridge users hold administrative rights, this enables full host compromise.

Critical Impact
Successful exploitation allows arbitrary code execution in the context of the current user, enabling attackers to install malware, exfiltrate data, or pivot to other systems on the network.

Affected Products

Adobe Bridge 13.0.8 and earlier 13.x versions
Adobe Bridge 14.1.1 and earlier 14.x versions
Apple macOS and Microsoft Windows installations of Adobe Bridge

Discovery Timeline

2024-08-14 - CVE-2024-39386 published to NVD and Adobe releases security bulletin APSB24-59
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-39386

Vulnerability Analysis

CVE-2024-39386 is classified as an out-of-bounds write [CWE-787]. The flaw resides in Adobe Bridge's file parsing logic. When Bridge processes a specifically crafted file, the application writes data beyond the allocated memory boundary. This corruption can be shaped by an attacker to overwrite adjacent memory structures, including function pointers or object metadata.

Attackers who control the out-of-bounds write can hijack execution flow. The result is arbitrary code execution running as the current user. Because Adobe Bridge is a digital asset management tool used by creative professionals, targeted phishing campaigns delivering malicious media files present a realistic attack path.

The vulnerability requires local file access and user interaction. An attacker must convince the victim to open a weaponized file with Adobe Bridge. Scope remains unchanged, meaning the code executes with the same permissions as the affected user session.

Root Cause

The root cause is insufficient bounds validation during file parsing. Adobe Bridge fails to properly verify buffer sizes before writing parsed content into memory. When a malformed file supplies unexpected values, the write operation extends past the intended buffer, corrupting adjacent heap or stack memory.

Attack Vector

The attack vector is local and requires user interaction. An attacker crafts a malicious file and delivers it through email, file sharing, or a compromised web download. When the victim opens the file in Adobe Bridge, parsing triggers the out-of-bounds write. Code execution occurs with the privileges of the current user, without any authentication requirement.

Refer to the Adobe Security Advisory APSB24-59 for vendor-supplied technical details.

Detection Methods for CVE-2024-39386

Indicators of Compromise

Unexpected child processes spawned by Adobe Bridge.exe or Adobe Bridge on macOS, particularly command interpreters such as cmd.exe, powershell.exe, or /bin/sh
Adobe Bridge process crashes with access violation exceptions logged shortly after opening media or asset files
Outbound network connections initiated by the Bridge process to previously unseen hosts following file open events

Detection Strategies

Monitor for anomalous process lineage where Adobe Bridge spawns scripting engines, LOLBins, or unsigned binaries
Enable exploit protection telemetry (control flow guard, ASLR events) and alert on memory corruption exceptions in the Bridge process
Correlate file open events in Bridge with subsequent file write activity to persistence locations such as Startup folders or LaunchAgents

Monitoring Recommendations

Track Adobe Bridge version inventory across endpoints to identify systems still running vulnerable builds at or below 13.0.8 and 14.1.1
Log and review email attachments and downloaded files with extensions handled by Adobe Bridge, including .psd, .ai, .indd, and other asset formats
Baseline normal Bridge behavior and alert on deviations such as unexpected DLL loads or injected threads

How to Mitigate CVE-2024-39386

Immediate Actions Required

Upgrade Adobe Bridge to the patched versions released in Adobe Security Advisory APSB24-59
Restrict Adobe Bridge usage to standard user accounts and avoid running the application with administrative privileges
Educate users to avoid opening Adobe Bridge files from untrusted sources such as unsolicited email attachments

Patch Information

Adobe released patches on August 14, 2024, addressing CVE-2024-39386 alongside other issues in bulletin APSB24-59. Administrators should apply the updates using the Creative Cloud desktop application or Adobe's enterprise deployment tooling. Verify installed versions exceed 13.0.8 and 14.1.1 after patching.

Workarounds

Block Adobe Bridge file types at the email gateway when they originate from external senders
Apply application allowlisting policies that prevent Bridge from executing child processes such as command shells or scripting hosts
Isolate creative workstations from sensitive network segments until patches are validated and deployed

bash

# Verify Adobe Bridge version on Windows via PowerShell
Get-ItemProperty "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*" |
  Where-Object { $_.DisplayName -like "Adobe Bridge*" } |
  Select-Object DisplayName, DisplayVersion

# Verify Adobe Bridge version on macOS
defaults read "/Applications/Adobe Bridge 2024/Adobe Bridge 2024.app/Contents/Info.plist" CFBundleShortVersionString