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TI-2023-21294 Aliases CVE-2023-40478GHSA-pq3r-x8gq-g8xm

Stack-based buffer overflow in NETGEAR RAX30

Priority LOW 34CWE-121Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

NETGEAR RAX30 Telnet CLI passwd Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR RAX30 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the telnet CLI service, which listens on TCP port 23. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-20009.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0083 57th 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
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
NETGEARRAX301.0.9.92_1—No fix listedCNA
  • RAX30 VendorNETGEAR Affected 1.0.9.92_1 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:netgear:rax30_firmware:*:*:*:*:*:*:*:*before 1.0.10.94VulnerableNETGEAR
cpe:2.3:h:netgear:rax30:-:*:*:*:*:*:*:*not specified by NVDRunning onNETGEAR
  • cpe:2.3:o:netgear:rax30_firmware:*:*:*:*:*:*:*:* Versions before 1.0.10.94 Vulnerable ·NETGEAR
  • cpe:2.3:h:netgear:rax30:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NETGEAR

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-40478
  2. 2026-10-03 Alias added: GHSA-pq3r-x8gq-g8xm

References

Advisory 2

  • TI-2023-26560 Stack-based buffer overflow in NETGEAR RAX30 CVSS 3.1HIGH 8.8
  • TI-2022-23402 Improper authentication in NETGEAR Nighthawk WiFi6 Router CVSS 3.1HIGH 8.8
  • TI-2023-12452 Buffer overflow in NETGEAR Nighthawk WiFi6 Router CVSS 3.1CRITICAL 9.8
  • TI-2025-28644 In Netgear RAX30 V1.0.10.94, a PHP-FPM misconfiguration vulnerability is caused by not… CVSS 3.1CRITICAL 9.8
  • TI-2023-12451 Buffer overflow in NETGEAR Nighthawk WiFi6 Router CVSS 3.1CRITICAL 9.8
  • TI-2023-01254 Improper authentication in Netgear RAX30 CVSS 3.1CRITICAL 9.8
See all 35 →

Sources

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