Description
A vulnerability was detected in TOTOLINK EX1200L 9.3.5u.6146_B20201023. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation results in null pointer dereference. The attack can be launched remotely. The exploit is now public and may be used.
Published: 2026-08-17
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability arises in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 within the setWizardCfg function of /cgi-bin/cstecgi.cgi. An attacker can remotely supply crafted input that triggers a null pointer dereference, causing the web service or device to crash. This loss of service impact is reflected in the CVSS score of 7.1 and is classified under CWEs for null pointer dereference (CWE-476) and CWE-404.

Affected Systems

Affected devices are TOTOLINK EX1200L units running firmware version 9.3.5u.6146_B20201023. No other versions or models are explicitly listed as impacted, so the risk is confined to this specific build.

Risk and Exploitability

The CVSS score indicates high severity availability risk. The EPSS score is not available, and the vulnerability is not listed in the KEV catalog. Attackers can launch the exploit remotely by targeting the CGI endpoint. Because the exploit has been made public, the likelihood of exploitation is elevated for networks where the device is exposed to untrusted traffic.

Generated by OpenCVE AI on August 17, 2026 at 20:48 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the firmware update from Totolink that resolves the null pointer dereference in the setWizardCfg function.
  • Disable or restrict remote access to the /cgi-bin/cstecgi.cgi endpoint by implementing firewall or ACL rules, limiting management traffic to trusted IP ranges or internal networks.
  • If a patch is not immediately available, isolate the device behind a network perimeter that blocks external HTTP traffic to the web configuration interface until the vulnerability can be addressed.

Generated by OpenCVE AI on August 17, 2026 at 20:48 UTC.

Tracking

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Advisories

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History

Mon, 17 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description A vulnerability was detected in TOTOLINK EX1200L 9.3.5u.6146_B20201023. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation results in null pointer dereference. The attack can be launched remotely. The exploit is now public and may be used.
Title TOTOLINK EX1200L cstecgi.cgi setWizardCfg null pointer dereference
First Time appeared Totolink
Totolink ex1200l
Weaknesses CWE-404
CWE-476
CPEs cpe:2.3:a:totolink:ex1200l:*:*:*:*:*:*:*:*
Vendors & Products Totolink
Totolink ex1200l
References
Metrics cvssV2_0

{'score': 6.8, 'vector': 'AV:N/AC:L/Au:S/C:N/I:N/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 6.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P'}

Subscriptions

Totolink Ex1200l
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-08-17T19:30:11.074Z

Reserved: 2026-08-17T13:04:55.935Z

Link: CVE-2026-75013

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-17T20:16:47.483

Modified: 2026-08-17T20:16:47.483

Link: CVE-2026-75013

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-17T21:00:14Z

Weaknesses
  • CWE-404

    Improper Resource Shutdown or Release

  • CWE-476

    NULL Pointer Dereference