Raisecomm RAX701-GC Series

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1. EXECUTIVE SUMMARY CVSS v4 9.3 ATTENTION: Exploitable remotely/low attack complexity Vendor: Raisecomm Equipment: RAX701-GC-WP-01 P200R002C52, RAX701-GC-WP-01 P200R002C53 Vulnerability: Authentication Bypass Using an Alternate Path or Channel
2. RISK EVALUATION Successful exploitation of this vulnerability could allow a remote attacker to bypass authentication and gain unauthenticated root shell access to the affected devices.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Raisecomm RAX701-GC products, are affected: RAX701-GC-WP-01 P200R002C52: Firmware version 5.5.27_20190111 RAX701-GC-WP-01 P200R002C53: Firmware version 5.5.13_20180720 and version 5.5.36_20190709 3.2 VULNERABILITY OVERVIEW 3.2.1 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL CWE-288 The affected Raisecom devices allow SSH sessions to be established without completing user authentication. This could allow attackers to gain shell access without valid credentials. CVE-2025-11534 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-11534. A base score of 9.3 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Information Technology, Communications COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: China 3.4 RESEARCHER HD Moore of runZero discovered this vulnerability and Tod Beardsley of runZero reported this vulnerability to CISA.
4. MITIGATIONS RaiseComm has not responded to requests to work with CISA to mitigate this vulnerability. Users of affected versions of RaiseComm products are invited to contact RaiseComm customer support for additional information. 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. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.
5. UPDATE HISTORY October 21, 2025: Initial Publication