CVE-2026-27310: Adobe Bridge Buffer Overflow Vulnerability

CVE-2026-27310 Overview

CVE-2026-27310 is a heap-based buffer overflow vulnerability [CWE-122] in Adobe Bridge versions 16.0.2, 15.1.4, and earlier. Attackers can achieve arbitrary code execution in the context of the current user when a victim opens a crafted file. The flaw requires local user interaction and affects Adobe Bridge installations on both Microsoft Windows and Apple macOS. Adobe addressed the issue in security advisory APSB26-39.

Critical Impact

Successful exploitation allows arbitrary code execution with the privileges of the logged-on user, enabling attackers to install programs, modify data, or create new accounts.

Affected Products

• Adobe Bridge 16.0.2 and earlier
• Adobe Bridge 15.1.4 and earlier
• Adobe Bridge installations on Microsoft Windows and Apple macOS

Discovery Timeline

• 2026-04-14 - CVE-2026-27310 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2026-27310

Vulnerability Analysis

The vulnerability is a heap-based buffer overflow [CWE-122] in Adobe Bridge's file parsing logic. Adobe Bridge processes a wide range of media and metadata formats, and crafted input can drive a write past the bounds of a heap-allocated buffer. The overflow corrupts adjacent heap structures, which an attacker can shape to redirect execution. Because Bridge runs in the security context of the invoking user, successful exploitation yields code execution at that privilege level. The attack is local and user-assisted: the victim must open a malicious file delivered through email, removable media, or a web download.

Root Cause

The root cause is improper validation of input length or structure during the parsing of a supported file format. Insufficient bounds checking on a heap buffer allows attacker-controlled data to overwrite chunk metadata or function pointers stored on the heap. This class of flaw frequently maps to missing size validation prior to memory copy operations such as memcpy or equivalent routines.

Attack Vector

The attack vector is local with required user interaction. An attacker crafts a malicious file targeting a parser in Adobe Bridge and delivers it to the victim using social engineering. When the user opens the file in Bridge, the parser triggers the heap overflow, and the attacker's payload executes with the user's privileges. No authentication is required, and the scope is unchanged. Public exploit code is not available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

No verified proof-of-concept code is publicly available. Refer to the Adobe Security Advisory APSB26-39 for vendor technical details.

Detection Methods for CVE-2026-27310

Indicators of Compromise

• Adobe Bridge process (Bridge.exe on Windows, Adobe Bridge on macOS) spawning unexpected child processes such as cmd.exe, powershell.exe, or shell interpreters
• Crash events or Windows Error Reporting entries naming the Bridge process with heap corruption signatures
• Suspicious files with Bridge-supported extensions arriving via email attachments or browser downloads from untrusted sources

Detection Strategies

• Monitor parent-child process relationships originating from Adobe Bridge and alert on execution of script interpreters or LOLBins
• Inspect unsigned or anomalous DLL loads inside the Bridge process address space
• Flag outbound network connections initiated by Adobe Bridge, which typically does not require broad internet access for file viewing

Monitoring Recommendations

• Collect endpoint telemetry covering process creation, image loads, and file open events for Adobe Bridge across Windows and macOS hosts
• Correlate file-open events on attacker-controlled file types with subsequent process or memory anomalies in Bridge
• Track installed Adobe Bridge versions in asset inventory to identify hosts running 16.0.2, 15.1.4, or earlier

How to Mitigate CVE-2026-27310

Immediate Actions Required

• Apply the patched Adobe Bridge releases referenced in advisory APSB26-39 to all affected Windows and macOS endpoints
• Identify and inventory all hosts running Adobe Bridge 16.0.2, 15.1.4, or earlier and prioritize patching for high-risk users
• Instruct users not to open Bridge-supported files received from untrusted sources until patches are deployed

Patch Information

Adobe published fixes in security bulletin Adobe Security Advisory APSB26-39. Upgrade Adobe Bridge to the fixed versions listed in that advisory. Use the Adobe Creative Cloud desktop application or enterprise deployment tooling to push the update across managed endpoints.

Workarounds

• Restrict opening of files in Adobe Bridge to those originating from trusted internal sources until patching completes
• Apply application allowlisting and reduce local user privileges so successful exploitation yields minimal additional access
• Block inbound delivery of attacker-favored file types at email and web gateways where business workflows allow

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

# macOS: verify installed Adobe Bridge version
mdls -name kMDItemVersion "/Applications/Adobe Bridge 2026/Adobe Bridge 2026.app"