How severe is CVE-2025-67445?

CVE-2025-67445 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-67445 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-67445?

CVE-2025-67445 affects Totolink X5000r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-67445?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-67445 have an EU (EUVD) identifier?

Yes. CVE-2025-67445 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208091.

When was CVE-2025-67445 published?

CVE-2025-67445 was published on 2026-02-24 and last updated on 2026-07-05.

CVE-2025-67445

CVE-2025-67445 is a high-severity vulnerability in Totolink X5000r Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208091
Weakness: CWE-400
Affected product: Totolink X5000r Firmware
Published: 2026-02-24
Last modified: 2026-07-05

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-67445?: CVE-2025-67445 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-67445 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-67445?: CVE-2025-67445 affects Totolink X5000r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-67445?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-67445 have an EU (EUVD) identifier?: Yes. CVE-2025-67445 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208091.
When was CVE-2025-67445 published?: CVE-2025-67445 was published on 2026-02-24 and last updated on 2026-07-05.

References

https://github.com/DaRkSpOoOk/CVE-2025-67445

EU advisories (EUVD)

http://totolink.com

Affected products (1)

cpe:2.3:o:totolink:x5000r_firmware:9.1.0cu.2415_b20250515:*:*:*:*:*:*:*

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