CVE-2025-12768 Overview
CVE-2025-12768 is an out-of-bounds write vulnerability [CWE-787] in Rockwell Automation FactoryTalk® Historian Machine Edition. An attacker with low-privilege authentication and adjacent network access can exploit the flaw to achieve remote code execution on the affected device. The vulnerability affects industrial data historian software used to collect and archive process data from programmable logic controllers (PLCs) and other automation assets.
Critical Impact
Successful exploitation allows an authenticated adjacent attacker to execute arbitrary code on the FactoryTalk Historian Machine Edition host, threatening the confidentiality, integrity, and availability of industrial control data.
Affected Products
- Rockwell Automation FactoryTalk® Historian Machine Edition
- See the Rockwell Automation Security Advisory SD1796 for specific affected versions
- Industrial control system (ICS) environments running the affected historian software
Discovery Timeline
- 2026-09-01 - CVE-2025-12768 published to NVD
- 2026-09-01 - Last updated in NVD database
Technical Details for CVE-2025-12768
Vulnerability Analysis
CVE-2025-12768 is classified as an out-of-bounds write [CWE-787]. The affected component writes data past the boundaries of an allocated memory buffer during request handling. An authenticated attacker who can reach the historian service from an adjacent network segment can trigger the memory corruption to gain code execution in the context of the vulnerable process.
Because FactoryTalk Historian Machine Edition typically runs alongside industrial automation systems, code execution on the host provides a pivot point into operational technology (OT) networks. Attackers can disrupt historian data integrity, tamper with archived process values, or move laterally toward controllers and human-machine interfaces (HMIs).
Root Cause
The root cause is improper validation of input length or index calculations when the historian service processes attacker-supplied data. When bounds checks are missing or incorrect, the program writes to memory outside the intended buffer. This corrupts adjacent stack or heap structures and can be steered to hijack control flow.
Attack Vector
Exploitation requires adjacent network access (AV:A) and low-level authenticated credentials (PR:L) to the FactoryTalk Historian Machine Edition service. No user interaction is required. The attacker submits a crafted request that triggers the out-of-bounds write, corrupts process memory, and executes attacker-controlled instructions on the target.
No public proof-of-concept exploit code is currently available. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Rockwell Automation Security Advisory SD1796 for vendor technical details.
Detection Methods for CVE-2025-12768
Indicators of Compromise
- Unexpected child processes spawned by the FactoryTalk Historian Machine Edition service account
- Crashes, restarts, or memory access violation events logged by the historian process
- Unusual outbound network connections originating from the historian host
- New or modified binaries, scripts, or scheduled tasks on the historian server
Detection Strategies
- Baseline the historian process behavior and alert on deviations such as new process ancestry, module loads, or command-line arguments
- Monitor authentication events for the historian service, focusing on low-privilege accounts connecting from adjacent OT/IT boundary segments
- Inspect network traffic to the historian for malformed protocol messages, oversized fields, or repeated fragmented requests preceding a service restart
Monitoring Recommendations
- Centralize Windows event logs, historian application logs, and network flow data in a SIEM for correlation
- Track service crash-restart patterns on the historian host, which often precede successful memory corruption exploitation
- Enable enhanced auditing on user accounts with historian access and review privilege use anomalies
How to Mitigate CVE-2025-12768
Immediate Actions Required
- Apply the patched version referenced in Rockwell Automation Security Advisory SD1796 as soon as it can be scheduled through change management
- Inventory all instances of FactoryTalk Historian Machine Edition and confirm software versions against the advisory
- Rotate credentials for accounts with access to the historian service, and enforce least privilege
- Restrict network access to the historian to a defined set of engineering workstations and servers
Patch Information
Rockwell Automation has published mitigation guidance in Security Advisory SD1796. Consult the Rockwell Automation Security Advisory for fixed versions, applicability, and vendor recommendations specific to your deployment.
Workarounds
- Segment the historian into a dedicated OT zone with firewall rules that block traffic from untrusted adjacent networks
- Disable or block remote access paths that are not required for historian operation
- Enforce multi-factor authentication and strong password policies on all accounts authorized to reach the historian service
- Follow ICS defense-in-depth guidance from CISA, including strict conduit definitions between IT and OT segments
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
