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1. EXECUTIVE SUMMARY

• CVSS v4 6.3
• ATTENTION: Exploitable remotely/Low attack complexity
• Vendor: Rockwell Automation
• Equipment: Industrial Data Center (IDC) with Cisco Switching, IDC-Managed Support contract with Cisco Switching, Network-Managed Support contract with Cisco network switch, Firewall-Managed Support contract with Cisco firewall
• Vulnerability: Stack-based Buffer Overflow

2. RISK EVALUATION

Successful exploitation of this vulnerability could result in arbitrary code execution.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

Rockwell Automation reports the following Lifecycle Services with Cisco are affected:

• Industrial Data Center (IDC) with Cisco Switching: Generations 1 – 5
• IDC-Managed Support contract with Cisco Switching: Generations 1 – 5
• Network-Managed Support contract with Cisco network switch: All versions
• Firewall-Managed Support contract with Cisco firewall: All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 STACK-BASED BUFFER OVERFLOW CWE-121

A third-party vulnerability exists in the affected products. The affected products use Cisco IOS XE Software which contains a vulnerability in the Simple Network Management Protocol (SNMP) subsystem. An authenticated, remote attacker with low privileges could cause a denial-of-service (DoS) condition on an affected device running Cisco IOS Software or Cisco IOS XE Software. To cause the DoS, the attacker must have the SNMPv2c or earlier read-only community string or valid SNMPv3 user credentials. An authenticated, remote attacker with high privileges could execute code as the root user on an affected device running Cisco IOS XE Software. To execute code as the root user, the attacker must have the SNMPv1 or v2c read-only community string or valid SNMPv3 user credentials and administrative or privilege 15 credentials on the affected device. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device over IPv4 or IPv6 networks. This vulnerability is due to a stack overflow condition in the SNMP subsystem of the affected software. A successful exploit could allow a low-privileged attacker to cause the affected system to reload, resulting in a DoS condition, or allow a high-privileged attacker to execute arbitrary code as the root user and obtain full control of the affected system.

CVE-2025-20352 has been assigned to this vulnerability. A CVSS v3 base score of 7.7 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

A CVSS v4 score has also been calculated for CVE-2025-20352. A base score of 6.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Rockwell Automation reported this vulnerability to CISA.

4. MITIGATIONS

Rockwell Automation recommends users take the following actions based on their situation.

Users with an active Rockwell Automation Infrastructure Managed Service contract:

• Contact Rockwell Automation to discuss actions needed for remediation efforts

Users without a Rockwell Automation managed services contract, refer to Cisco’s workarounds below:

• Cisco’s Workarounds

Additionally, users of the affected software who are unable to upgrade to one of the corrected versions are encouraged to apply security best practices, where possible.

• Security Best Practices

For more information about this issue, see the advisory on the Rockwell Automation security page.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• October 09, 2025: Initial Republication of Rockwell Automation advisory SD1750