CVE-2026-50059: Solid Edge DFT File RCE Vulnerability

CVE-2026-50059 Overview

CVE-2026-50059 is an out-of-bounds write vulnerability in Siemens Solid Edge affecting the parsing of specially crafted DFT files. The flaw exists in Solid Edge SE2025 versions prior to V225.0 Update 15 and Solid Edge SE2026 versions prior to V226.0 Update 7. An attacker who convinces a user to open a malicious DFT file can trigger memory corruption and execute code in the context of the current process. The vulnerability is classified under CWE-787: Out-of-bounds Write.

Critical Impact
Successful exploitation allows arbitrary code execution in the context of the Solid Edge process, potentially compromising engineering workstations and intellectual property.

Affected Products

Siemens Solid Edge SE2025 (all versions before V225.0 Update 15)
Siemens Solid Edge SE2026 (all versions before V226.0 Update 7)
DFT file parsing component

Discovery Timeline

2026-08-11 - CVE CVE-2026-50059 published to NVD
2026-08-11 - Last updated in NVD database

Technical Details for CVE-2026-50059

Vulnerability Analysis

The vulnerability resides in the DFT file parser used by Solid Edge. When Solid Edge processes a specially crafted DFT drawing file, the parser writes data outside the bounds of an allocated buffer. This out-of-bounds write corrupts adjacent memory structures on the heap or stack.

An attacker can shape the malformed file so that overwritten memory includes function pointers or return addresses. Controlling those values redirects execution to attacker-supplied code. The result is arbitrary code execution inside the Solid Edge process, inheriting the privileges of the user running the application.

Exploitation requires user interaction. A victim must open the malicious DFT file, typically delivered via email, shared drives, or supply-chain scenarios where CAD files are exchanged between engineering partners.

Root Cause

The root cause is missing or insufficient validation of length or index values within the DFT file structure. The parser trusts attacker-controlled size fields and writes beyond the boundaries of the destination buffer, matching the [CWE-787] pattern.

Attack Vector

The attack vector is local and requires user interaction. An attacker crafts a malicious DFT file and delivers it to a target user. When the user opens the file in a vulnerable Solid Edge installation, the parser triggers the out-of-bounds write and executes the attacker's payload. Refer to the Siemens Security Advisory SSA-621657 for vendor-provided technical details.

// No verified proof-of-concept code is publicly available.
// The vulnerability is triggered by opening a malformed DFT file
// in a vulnerable Solid Edge SE2025 or SE2026 installation.

Detection Methods for CVE-2026-50059

Indicators of Compromise

DFT files received from untrusted or unexpected sources, particularly those with anomalous size or structural fields
Unexpected child processes spawned by Edge.exe or related Solid Edge binaries after opening a DFT file
Crashes or exception events involving Solid Edge processes correlated with recent DFT file access

Detection Strategies

Monitor process creation events where Solid Edge is the parent process and spawns shells, scripting engines, or rundll32.exe
Alert on Solid Edge processes making outbound network connections shortly after opening a document
Inspect DFT files at email and file-sharing gateways for malformed structures that deviate from Siemens format specifications

Monitoring Recommendations

Enable process telemetry and memory-integrity events on engineering workstations running Solid Edge
Track file-open events for .dft extensions and correlate with subsequent process anomalies
Retain crash dumps from Solid Edge for forensic review when unexpected termination occurs

How to Mitigate CVE-2026-50059

Immediate Actions Required

Update Solid Edge SE2025 to V225.0 Update 15 or later
Update Solid Edge SE2026 to V226.0 Update 7 or later
Instruct users to open DFT files only from trusted sources and validate origin before opening attachments

Patch Information

Siemens has released fixed versions addressing this vulnerability. Users should upgrade Solid Edge SE2025 to V225.0 Update 15 or later, and Solid Edge SE2026 to V226.0 Update 7 or later. Full remediation guidance is available in the Siemens Security Advisory SSA-621657.

Workarounds

Restrict DFT file exchange to trusted engineering partners and validated repositories
Apply application allowlisting to block execution of unexpected child processes launched by Solid Edge
Segment engineering workstations from general corporate networks to limit lateral movement following exploitation

bash

# Verify installed Solid Edge version on Windows
reg query "HKLM\SOFTWARE\Siemens\Solid Edge\Current Version" /v Version