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Moxa issued guidance for a critical remote code execution (RCE) risk affecting multiple industrial Ethernet switch lines due to CVE-2023-38408 in the OpenSSH ssh-agent PKCS#11 feature (OpenSSH versions prior to 9.3p2). The flaw is described as an unreliable/unquoted search path issue (CWE-428) and is characterized as an incomplete fix related to CVE-2016-10009; exploitation can lead to full device compromise impacting confidentiality, integrity, and availability, with a reported CVSS 3.1 score of 9.8.
Impacted products include Moxa EDS series switches (e.g., EDS-G4000, EDS-4008/4009/4012/4014, EDS-G4008/G4012/G4014) running firmware v4.1 or earlier, and RKS series switches (e.g., RKS-G4000, RKS-G4028, RKS-G4028-L3) running firmware v5.0 or earlier. Moxa’s remediation requires obtaining patches via Moxa Technical Support rather than public download; the cited target versions are 4.1.58 for EDS and 5.0.4 for RKS. Until updates can be applied, recommended mitigations include restricting network access (e.g., firewalls/ACLs) and segmenting OT networks (e.g., VLAN separation) to limit exposure.
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3 events from the most recent confirmed update back to the earliest known activity.
Moxa provided remediation guidance and made fixed firmware available via Moxa Technical Support rather than public download, including versions such as EDS 4.1.58 and RKS 5.0.4. The company also recommended interim mitigations including network segmentation, restricted access, hardening authentication, avoiding Internet exposure, and monitoring for anomalies.
Moxa disclosed that multiple industrial Ethernet switch models in its EDS and RKS series were affected by CVE-2023-38408, including EDS firmware 4.1 or earlier and RKS firmware 5.0 or earlier. The company warned that exploitation could lead to full system compromise and pose risks to OT environments.
CVE-2023-38408 was identified in OpenSSH's ssh-agent PKCS#11 feature, where an unreliable library search path could allow remote code execution when agent forwarding is used to an attacker-controlled system. The issue was described as an incomplete fix for CVE-2016-10009 and assigned a CVSS score of 9.8.
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Moxa disclosed and patched **CVE-2024-12297**, a critical authorization flaw in multiple industrial Ethernet switch lines that can let a remote, unauthenticated attacker bypass authentication and access device functions. The vulnerability stems from weaknesses in frontend authorization logic and client-side versus back-end verification, allowing brute-force credential guessing and potential **MD5 collision** attacks to forge authentication hashes. Moxa rated the issue **CVSS 9.2** and said exploitation could expose sensitive configurations or disrupt services on affected switches. The flaw initially affected the **EDS-508A Series** on firmware `3.11` and earlier, and advisories later expanded coverage to additional **EDS**, **SDS**, and **PT series** models, including PT-508, PT-510, PT-7528, PT-7728, PT-7828, PT-G503, PT-G510, PT-G7728, and PT-G7828 below specified fixed versions. Moxa issued firmware updates for most impacted products and told some EDS-508A customers to obtain patches through technical support. The company also urged operators to minimize Internet exposure, restrict SSH and management access to trusted networks, apply least privilege and MFA where possible, and strengthen logging, IDS/IPS, and network monitoring around affected operational technology environments.
Jul 24, 2026
Moxa issued security advisories for multiple industrial and embedded product families, including the **UC Series**, **V Series**, **VM-1220 Series**, **ioThinx 4530 Series**, **AIG Series**, **BXP Series**, **DRP-A100/DRP-C100 Series**, and **RKP Series**. A Canadian Centre for Cyber Security notice highlighted the disclosures and directed operators to review Moxa’s published advisories and apply vendor-provided updates. The advisories include **`CVE-2026-46333`**, identified as the **"ssh-keysign-pwn"** vulnerability in the Linux kernel. The issue affects control-system environments using impacted Moxa platforms, raising patching and asset-review priorities for organizations that rely on these devices in operational technology and embedded deployments.
Jul 24, 2026
Moxa issued advisory **MPSA-263140** for multiple industrial and embedded computing product lines affected by three Linux kernel vulnerabilities: **CVE-2026-31431** ("**Copy Fail**") and **CVE-2026-43284** plus **CVE-2026-43500** ("**Dirty Frag**"). The company said the flaws could allow unprivileged local users to gain administrative or root access on affected devices, with added risk of container escape and host compromise in environments running untrusted workloads. Canada’s Cyber Centre separately alerted operators to review Moxa’s guidance for impacted **UC, V, VM, ioThinx, AIG, BXP, DRP, and RKP** series products. Because permanent fixes were not yet broadly available for all affected Moxa platforms, the vendor urged immediate mitigations such as blacklisting or unloading vulnerable kernel modules including `rxrpc`, `esp4`, and `esp6`, while warning that disabling `esp4` and `esp6` can break **IPsec/VPN** connectivity and some devices require bootloader changes because `algif_aead` is built into the kernel. For CTOS-based Debian systems, Moxa advised updating from Debian security repositories, reinstalling the x86 SDK, and rebooting. The advisory follows wider industry response to the same kernel bugs: **CVE-2026-31431** was added to CISA’s **Known Exploited Vulnerabilities** catalog, Ubuntu released mitigations that disable the vulnerable module, and Red Hat published OpenShift guidance for Dirty Frag-related exposure.
Jun 29, 2026