TOTOLINK X5000R V9.1.0cu.2415_B20250515 contains a denial-of-service vulnerability in /cgi-bin/cstecgi.cgi. The CGI reads the CONTENT_LENGTH environment variable and allocates memory using malloc (CONTENT_LENGTH + 1) without sufficient bounds checking. When lighttpd s request size limit is not enforced, a crafted large POST request can cause memory exhaustion or a segmentation fault, leading to a crash of the management CGI and loss of availability of the web interface.
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Fixes

Solution

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Workaround

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History

Wed, 25 Feb 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Totolink x5000r Firmware
CPEs cpe:2.3:h:totolink:x5000r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:x5000r_firmware:9.1.0cu.2415_b20250515:*:*:*:*:*:*:*
Vendors & Products Totolink x5000r Firmware

Wed, 25 Feb 2026 17:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Wed, 25 Feb 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink x5000r
Vendors & Products Totolink
Totolink x5000r

Tue, 24 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Description TOTOLINK X5000R V9.1.0cu.2415_B20250515 contains a denial-of-service vulnerability in /cgi-bin/cstecgi.cgi. The CGI reads the CONTENT_LENGTH environment variable and allocates memory using malloc (CONTENT_LENGTH + 1) without sufficient bounds checking. When lighttpd s request size limit is not enforced, a crafted large POST request can cause memory exhaustion or a segmentation fault, leading to a crash of the management CGI and loss of availability of the web interface.
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-25T16:25:39.018Z

Reserved: 2025-12-08T00:00:00.000Z

Link: CVE-2025-67445

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-02-24T15:21:36.707

Modified: 2026-02-25T17:54:09.220

Link: CVE-2025-67445

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-25T11:45:18Z

Weaknesses