CVE-2026-100127 Overview
Adobe Bridge contains an out-of-bounds write vulnerability [CWE-787] that enables arbitrary code execution in the context of the current user. Exploitation requires user interaction: a victim must open a malicious file crafted by an attacker. The flaw affects local attack scenarios and does not require prior authentication to the target system.
Adobe published this issue in security advisory APSB26-167. The vulnerability carries confidentiality, integrity, and availability impacts rated High, reflecting full compromise of user-level processes once exploitation succeeds.
Critical Impact
Successful exploitation grants attackers arbitrary code execution with the privileges of the user running Adobe Bridge, enabling file access, data theft, and lateral movement.
Affected Products
- Adobe Bridge (specific versions listed in Adobe advisory APSB26-167)
- Deployments on Windows and macOS platforms where Adobe Bridge is installed
- Enterprise environments distributing Bridge via Adobe Creative Cloud
Discovery Timeline
- 2026-10-13 - CVE-2026-100127 published to the National Vulnerability Database
- 2026-10-14 - Last updated in NVD database
Technical Details for CVE-2026-100127
Vulnerability Analysis
The vulnerability is an out-of-bounds write in Adobe Bridge's file parsing logic. When Bridge processes a crafted file, the application writes data past the bounds of an allocated memory buffer. This corruption of adjacent memory structures can be steered by an attacker to influence program control flow.
Out-of-bounds write conditions [CWE-787] commonly stem from missing or incorrect length validation during parsing of structured file formats. In the context of Adobe Bridge, the parser handles numerous media and metadata formats, each presenting potential input-handling boundaries where validation errors become exploitable primitives.
An attacker who controls the layout of corrupted memory can overwrite function pointers, vtables, or return addresses. The result is arbitrary code execution within the Bridge process, running under the current user's security context.
Root Cause
The root cause is improper validation of input-derived length or index values before writing to a memory buffer. Bridge's file-processing routines fail to constrain write operations to the allocated buffer size, allowing adjacent memory to be modified when parsing adversary-controlled content.
Attack Vector
Exploitation requires local file access and user interaction. An attacker delivers a malicious file through email, shared storage, removable media, or a web download. When the victim opens the file in Adobe Bridge, parsing triggers the out-of-bounds write and executes attacker-supplied code.
Because execution inherits the user's privileges, attackers gain access to any resource the user can reach, including documents, credentials cached in user profiles, and network shares.
No verified public proof-of-concept code is available. Refer to the Adobe Security Advisory APSB26-167 for vendor technical details.
Stop Remote Code Execution Before It Runs
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Stop Exploit AttemptsDetection Methods for CVE-2026-100127
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
- Unexpected network connections initiated by the Bridge process to untrusted destinations
- Crash reports or Windows Error Reporting entries referencing access violations within Bridge modules
- Creation of executable files or scripts in user-writable directories shortly after a Bridge file-open event
Detection Strategies
- Hunt for Adobe Bridge executing child processes outside its normal process tree, especially command interpreters and script hosts
- Correlate Bridge file-open telemetry with subsequent process creation, file writes to startup locations, and outbound network activity
- Monitor for memory-corruption crash signatures affecting Bridge image loads across the fleet
Monitoring Recommendations
- Enable process-creation and command-line auditing on endpoints running Adobe Bridge
- Ingest endpoint telemetry into a centralized analytics platform to correlate Bridge activity with downstream behavior
- Track Adobe Bridge version inventory to confirm patch deployment status across managed assets
How to Mitigate CVE-2026-100127
Immediate Actions Required
- Apply the Adobe security update referenced in advisory APSB26-167 to all systems running Adobe Bridge
- Restrict opening of untrusted files, including those received by email or downloaded from unverified sources
- Audit endpoints to identify Adobe Bridge installations outside standard managed deployments
Patch Information
Adobe has released fixed versions of Bridge addressing CVE-2026-100127. Consult the Adobe Security Advisory APSB26-167 for the specific patched version numbers and download guidance via Adobe Creative Cloud.
Workarounds
- Block or quarantine inbound file types processed by Adobe Bridge at email and web gateways until patching completes
- Apply application control policies that prevent Bridge from spawning command interpreters or script hosts
- Operate Adobe Bridge under standard user accounts, never under administrative privileges, to limit post-exploitation impact
# Verify installed Adobe Bridge version on Windows (PowerShell)
Get-ItemProperty "HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*" |
Where-Object { $_.DisplayName -like "*Adobe Bridge*" } |
Select-Object DisplayName, DisplayVersion, InstallLocation
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
