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TI-2026-70076 Aliases CVE-2026-39453

Reachable assertion in Red Lion N-Tron 700 Series causes reboots

Priority LOW 37CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
Low · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-617.

Summary

Red Lion Controls 700 Series switches run firmware before Firmware Versions 3.11.0 and bootloader before Bootloader Versions 2.0.6.1. A reachable assertion (CWE-617) lets a request to a certain URL on the web server reboot the switch. A remote attacker with low privileges can repeat the request to keep the switch rebooting, which causes denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Navigating to a certain URL on the switch’s web server causes the switch to reboot. This can be automated using a tool like curl to create DoS conditions where the switch constantly reboots.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00289 21st percentileScored 2026-11-07
Fix Fixed 700 Series (Red Lion Controls): Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1, 3.11.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red Lion Controls700 Seriesbefore Firmware Versions 3.11.0; before Bootloader Versions 2.0.6.1Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1, 3.11.1Patch availableCNA
  • 700 Series VendorRed Lion Controls Affected before Firmware Versions 3.11.0; before Bootloader Versions 2.0.6.1 Fixed in Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1, 3.11.1 Patch available CNA

Remediation

Firmware Versions 3.11.0 and 3.11.1 and Bootloader Versions 2.0.6.1 fix the flaw in the Red Lion Controls 700 Series.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA 700 Series (Red Lion Controls) Fixed in Firmware Versions 3.11.0, Bootloader Versions 2.0.6.1, 3.11.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Red Lion Controls 700 Series Bootloader Versions 2.0.6.1, Firmware Versions 3.11.0

    7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW

    Other records, highest priority first

    • TI-2026-70077 Red Lion Controls N-Tron 700 Series Insufficiently Protected CredentialsPriority MEDIUM 42
    • TI-2026-70075 Missing authentication in Red Lion N-Tron 700 Series over SNMPPriority MEDIUM 42
    • TI-2026-70071 Recoverable password storage in Red Lion Controls N-Tron 700 SeriesPriority MEDIUM 41
    Show all 7 records →

Timeline

  1. 2026-10-09 Threatist record created from CVE-2026-39453
  2. 2026-10-11 Priority changed: MEDIUM → LOW
  3. 2026-10-11 CISA SSVC decision points changed

References

Other 4

  • TI-2023-22865 Red Lion Controls Sixnet RTU Authentication Bypass Using An Alternative Path Or Channel CVSS 3.1CRITICAL 10.0
  • TI-2023-21028 Red Lion Controls Sixnet RTU Exposed Dangerous Method Or Function CVSS 3.1CRITICAL 10.0
  • TI-2016-07615 Hard-coded credentials in Red Lion Controls Sixnet-Managed Industrial Switches CVSS 3.0CRITICAL 10.0
  • TI-2026-70077 Red Lion Controls N-Tron 700 Series Insufficiently Protected Credentials CVSS 4.0CRITICAL 9.3
  • TI-2026-70075 Missing authentication in Red Lion N-Tron 700 Series over SNMP CVSS 4.0CRITICAL 9.3
  • TI-2026-70071 Recoverable password storage in Red Lion Controls N-Tron 700 Series CVSS 4.0CRITICAL 9.3
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences