CVE-2026-48342: Adobe Bridge RCE Vulnerability

CVE-2026-48342 Overview

CVE-2026-48342 is an integer overflow or wraparound vulnerability [CWE-190] in Adobe Bridge that can lead to arbitrary code execution in the context of the current user. Exploitation requires local access and user interaction, specifically opening a maliciously crafted file. Adobe published the fix in security bulletin APSB26-81. The flaw affects Adobe Bridge on both Microsoft Windows and Apple macOS platforms.

Critical Impact
A successful attack yields arbitrary code execution with the privileges of the current user, enabling data theft, persistence, and lateral movement from a single opened file.

Affected Products

Adobe Bridge (versions listed in Adobe Security Bulletin APSB26-81)
Apple macOS installations of Adobe Bridge
Microsoft Windows installations of Adobe Bridge

Discovery Timeline

2026-07-14 - CVE-2026-48342 published to the National Vulnerability Database
2026-07-16 - CVE-2026-48342 record last modified in NVD
Vendor advisory - Adobe published Adobe Security Bulletin APSB26-81

Technical Details for CVE-2026-48342

Vulnerability Analysis

Adobe Bridge parses numerous image and media file formats. This vulnerability arises when the application performs arithmetic on values derived from attacker-controlled fields inside a crafted file. When the computed value exceeds the representable range of the integer type, the result wraps around and produces a smaller-than-expected size. Subsequent memory operations rely on that miscalculated size, leading to corruption of adjacent memory. An attacker can shape the corrupted memory to hijack control flow and execute arbitrary code as the current user.

Because the attack vector is local and requires user interaction, delivery typically involves phishing emails, malicious downloads, or files staged on shared storage. No elevation of privilege is required prior to opening the file, but the resulting code runs with the user's rights.

Root Cause

The defect is an integer overflow or wraparound [CWE-190] in file parsing logic. Length or count fields inside a malicious file cause an arithmetic calculation, such as a size multiplication for a buffer allocation, to wrap. The undersized allocation is then written using the original untrusted length, producing an out-of-bounds write that the attacker uses to achieve code execution.

Attack Vector

An attacker crafts a malicious file containing manipulated header or metadata values that trigger the overflow during parsing. The victim opens the file in Adobe Bridge, which begins parsing and reaches the vulnerable arithmetic path. Memory corruption follows, and the shaped payload executes in the Bridge process with the current user's privileges. No network exposure is required, and no prior authentication to the target system is needed beyond a normal interactive session.

No public proof-of-concept exploit code is available for CVE-2026-48342 at the time of publication. See the Adobe Security Bulletin APSB26-81 for the official technical description.

Detection Methods for CVE-2026-48342

Indicators of Compromise

Unexpected child processes spawned by Bridge.exe on Windows or the Adobe Bridge helper processes on macOS, such as command shells, powershell.exe, or scripting hosts.
Adobe Bridge process crashes or Windows Error Reporting entries referencing access violations shortly after a user opens a media file from email or removable media.
Outbound network connections initiated by the Bridge process to previously unseen hosts following file open events.

Detection Strategies

Hunt for process lineage anomalies where Adobe Bridge is the parent of interpreters, LOLBins, or file-writing utilities.
Alert on file-write activity by the Bridge process into autorun, startup, or scheduled task locations.
Correlate Bridge process crash telemetry with subsequent execution events on the same host within a short time window.

Monitoring Recommendations

Ingest endpoint process, file, and network telemetry from workstations that have Adobe Bridge installed and retain it for retrospective hunts.
Track version inventory of Adobe Bridge across the fleet to confirm patch deployment progress against the versions listed in APSB26-81.
Monitor email and web gateways for delivery of image and asset file types commonly opened in Bridge, particularly from external senders.

How to Mitigate CVE-2026-48342

Immediate Actions Required

Apply the Adobe Bridge update referenced in security bulletin APSB26-81 on all Windows and macOS endpoints where Bridge is installed.
Instruct users to avoid opening Bridge-associated files received from untrusted sources until patching is complete.
Prioritize patch deployment for creative, marketing, and design workstations where Adobe Bridge is in active daily use.

Patch Information

Adobe has released fixed versions of Adobe Bridge as documented in Adobe Security Bulletin APSB26-81. Administrators should consult the bulletin for the specific fixed version numbers for each supported release channel and deploy through Adobe Creative Cloud, enterprise deployment tooling, or managed software distribution systems.

Workarounds

No vendor-supplied workaround is listed; apply the update as the primary remediation.
Restrict opening of untrusted asset files in Adobe Bridge through user awareness training and email attachment filtering.
Enforce least-privilege user accounts so that any successful exploitation runs without administrative rights, limiting downstream impact.

bash

# Example: verify installed Adobe Bridge version on Windows
reg query "HKLM\SOFTWARE\Adobe\Bridge" /s | findstr /I "Version"

# Example: verify installed Adobe Bridge version on macOS
defaults read "/Applications/Adobe Bridge 2026/Adobe Bridge 2026.app/Contents/Info.plist" CFBundleShortVersionString