CISA ICSA-26-281-01: Update Red Lion N-Tron 700 Series Switches
Tech GuruQuick Answer
The authority published ICSA-26-281-01 for Red Lion Controls N-Tron 700 Series industrial Ethernet switches. CISA reports hard-coded or recoverable credentials, missing authentication, unauthenticated code upload, reachable assertion, and alternate-path authentication issues that can enable administrative access, configuration changes, firmware upload, or repeated switch reboot. Affected deployments should be matched to the authority's exact scope and moved to the supported fixed release.
Patch The OT Product And Verify Network Isolation
What to do now: Inventory Red Lion Controls N-Tron 700 Series industrial Ethernet switches, match the exact affected release, apply the authority-supported update and mitigations, validate process and network behavior in a controlled window, and retain change and monitoring evidence.
Last verified: 2026-10-10 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Red Lion Controls N-Tron 700 Series industrial Ethernet switches |
|---|---|
| Advisory | ICSA-26-281-01 |
| CVEs | CVE-2026-28745, CVE-2026-29797, CVE-2026-32645, CVE-2026-33272, CVE-2026-33367, CVE-2026-39453, CVE-2026-39460 |
| Authoritative release date | 2026-10-08 06:00:00 UTC in CISA's authoritative CSAF record |
| Authority revision date | 2026-10-08 06:00:00 UTC; initial CISA advisory |
| Affected versions | N-Tron 700 Series firmware 3.11.0 and earlier and bootloader 2.0.6.1 and earlier, as mapped by CISA to the seven advisory CVEs. |
| Fixed version | N-Tron 700 Series firmware 3.11.1 or later; also follow current Red Lion/HMS bootloader direction because CISA does not state a separate fixed bootloader release |
| CVSS base score | 4.9 / 6.0 / 7.1 / 7.5 / 8.1 / 8.3 (CVSS v3.1) |
| CVSS severity | Medium to High |
| Exploitation status | CISA is not aware of public exploitation specifically targeting these vulnerabilities as of the advisory release; no exploitation claim is inferred. |
What Changed
CISA reports hard-coded or recoverable credentials, missing authentication, unauthenticated code upload, reachable assertion, and alternate-path authentication issues that can enable administrative access, configuration changes, firmware upload, or repeated switch reboot.
What To Validate Now
- Inventory. Locate Red Lion Controls N-Tron 700 Series industrial Ethernet switches, exact releases, architectures or image types, owners, network zones, remote-access paths, dependencies, and recovery procedures.
- Establish applicability. Compare each deployment with CISA's affected-version statement: N-Tron 700 Series firmware 3.11.0 and earlier and bootloader 2.0.6.1 and earlier, as mapped by CISA to the seven advisory CVEs. Do not infer applicability from vendor or product-family presence alone.
- Remediate. Apply N-Tron 700 Series firmware 3.11.1 or later; also follow current Red Lion/HMS bootloader direction because CISA does not state a separate fixed bootloader release and the network-exposure controls in the current CISA advisory after an OT impact and risk assessment.
- Validate. Confirm the resulting version and configuration, exercise representative process, administration, network, logging, redundancy, and recovery paths, and monitor for regressions.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Industrial switch updates can disrupt network paths and dependent processes. Stage the supported firmware with OT owners, confirm configuration and recovery backups, validate redundant paths, and preserve firmware, bootloader, SNMP, web-interface, and change evidence.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
