Description
An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunEnable parameter to /cgi-bin/cstecgi.cgi.
Published: 2026-04-23
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: Remote Command Execution
Action: Assess Impact
AI Analysis

Impact

The flaw allows arbitrary command execution through the stunEnable parameter exposed in /cgi-bin/cstecgi.cgi. This is a classic command-injection vulnerability (CWE‑77). An attacker who can reach the affected endpoint can run arbitrary system commands on the router, compromising confidentiality, integrity, and availability of the device and any connected networks.

Affected Systems

Totolink A3300R router, firmware version 17.0.0cu.557_B20221024.

Risk and Exploitability

The CVSS score of 9.8 indicates critical severity, yet the EPSS score of less than 1% suggests low likelihood of exploitation in the near term. The vulnerability is not listed in the CISA KEV catalog. Attackers would need remote access to the web interface exposing /cgi-bin/cstecgi.cgi to exploit the flaw.

Generated by OpenCVE AI on April 28, 2026 at 07:44 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Restrict inbound traffic to the web interface or the /cgi-bin/cstecgi.cgi endpoint, allowing only trusted administrative networks.
  • Disable or block the stunEnable feature if the router firmware provides an option to turn it off.
  • Apply the vendor’s firmware update as soon as a patched version becomes available, or, if none exists, seek a custom secure configuration to neutralize the command injection path.
  • Continuously monitor for anomalous command execution or unexpected traffic toward the router’s management interface.
  • Segment the network to limit the impact range of a compromised router.

Generated by OpenCVE AI on April 28, 2026 at 07:44 UTC.

Tracking

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Advisories

No advisories yet.

History

Tue, 28 Apr 2026 08:00:00 +0000

Type Values Removed Values Added
Title Command Injection via stunEnable Parameter in Totolink A3300R Firmware

Fri, 24 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink a3300r
Totolink a3300r Firmware
CPEs cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*
Vendors & Products Totolink
Totolink a3300r
Totolink a3300r Firmware

Thu, 23 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-77
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 23 Apr 2026 18:15:00 +0000

Type Values Removed Values Added
Description An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the stunEnable parameter to /cgi-bin/cstecgi.cgi.
References

Subscriptions

Totolink A3300r A3300r Firmware
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-23T18:27:25.087Z

Reserved: 2026-03-09T00:00:00.000Z

Link: CVE-2026-31175

cve-icon Vulnrichment

Updated: 2026-04-23T18:24:59.065Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-23T18:16:24.767

Modified: 2026-04-24T15:12:26.767

Link: CVE-2026-31175

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-28T07:45:26Z

Weaknesses