TI-2026-75498 Aliases CVE-2026-111712 GHSA-5r7c-rr63-2rwm

Authentication bypass in Netcore NR256CN via prefixed CGI paths

LOW 36CWE-288Published 2026-10-16 · Updated 2026-10-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-288.

Summary

Netcore NR256CN through 1.5.140116 contains an authentication bypass (CWE-288) in which requests whose path is prefixed with a public route reach protected management handlers. An unauthenticated remote attacker can invoke these management functions without credentials.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Netcore NR256CN through 1.5.140116 contains an authentication bypass vulnerability that allows unauthenticated attackers to reach protected management CGI handlers by prefixing the URI with a public route. Attackers can request paths prefixed with l7_web_auth.cgi or an .ico route to invoke protected management handlers without credentials.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00227 13th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Netcore	NR256CN	up to 1.5.140116	—	No fix listed	CNA

NR256CN VendorNetcore Affected up to 1.5.140116 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Netcore NR256CN.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-16 Threatist record created from CVE-2026-111712
2026-10-16 CISA SSVC decision points changed
2026-10-16 Priority changed: MEDIUM → LOW
2026-10-16 Alias added: GHSA-5r7c-rr63-2rwm

References

Advisory 1

https://github.com/lukadqq/netcore-router-public-refs/blob/a44d562736b41c944223297e9144d2ad7fa2aff1/2026.10.15-netcore-nr256cn-cgi-auth-bypass-alternate-path.md

TI-2026-71052 Improper authentication in Netcore NR268 CGI Execution CVSS 4.0CRITICAL 10.0
TI-2026-65286 Netcore NAP930 Network Tools CGI network_tools eval os command injection CVSS 4.0CRITICAL 10.0
TI-2026-65110 Netcore NR289-GE boa_temp process_request missing authentication CVSS 4.0CRITICAL 10.0
TI-2026-65109 Netcore NR289-GE CGI set_ntp_server_ip.cgi system os command injection CVSS 4.0CRITICAL 10.0
TI-2026-65108 Netcore NR289-GE Location Time location_time.cgi system os command injection CVSS 4.0CRITICAL 10.0
TI-2026-65105 Netcore NR289-GE CGI ap_ip.cgi system os command injection CVSS 4.0CRITICAL 10.0

See all 60 →

Sources

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