Resource exhaustion in Totolink X5000r
CVE-2025-67445
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.003 (25.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Totolink X5000r
- Totolink X5000r_firmware — versions 9.1.0cu.2415_b20250515
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Product)
- cve@mitre.org (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-67445?
- CVE-2025-67445 is a high-severity vulnerability in Totolink X5000r, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-02-24.
- How severe is CVE-2025-67445?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2025-67445 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.