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TI-2026-53249 Aliases CVE-2026-76071GHSA-mx2q-89wp-jrvh

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter

Priority HIGH 81CWE-121Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01418 72nd percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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
NetisNC63up to 3.0.0.3327—No fix listedCNA
  • NC63 VendorNetis Affected up to 3.0.0.3327 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76071
  2. 2026-10-03 Alias added: GHSA-mx2q-89wp-jrvh

References

Exploit 2

Other 1

  • TI-2019-13967 Netis WF2419 is vulnerable to authenticated Remote Code Execution (RCE) as root through… KEVCVSS 3.1HIGH 7.5
  • TI-2024-15118 NETIS SYSTEMS MW5360 V1.0.1.3031 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8
  • TI-2024-16976 Netis WF2780 v2.1.40144 was discovered to contain a command injection vulnerability via the wps_ap_ssid5g parameter CVSS 3.1CRITICAL 9.8
  • TI-2023-24351 Netis N3Mv2-V1.0.1.865 was discovered to contain a command injection vulnerability via… CVSS 3.1CRITICAL 9.8
  • TI-2023-24350 Netis N3Mv2-V1.0.1.865 was discovered to contain a command injection vulnerability via… CVSS 3.1CRITICAL 9.8
  • TI-2023-24349 Netis N3Mv2-V1.0.1.865 was discovered to contain a command injection vulnerability via… CVSS 3.1CRITICAL 9.8
See all 67 →

Sources

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