What is CVE-2025-51630?

CVE-2025-51630 is a critical-severity vulnerability in Totolink N350rt, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-07-17.

How severe is CVE-2025-51630?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Totolink N350rt

CVE-2025-51630

TOTOLINK N350RT V9.3.5u.6139_B20201216 was discovered to contain a buffer overflow via the ePort parameter in the function setIpPortFilterRules.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (36.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink N350rt
Totolink N350rt_firmware — versions 9.3.5u.6139_b20201216
N/a — versions n/a

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-51630?: CVE-2025-51630 is a critical-severity vulnerability in Totolink N350rt, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2025-07-17.
How severe is CVE-2025-51630?: Critical severity. CVSS v3 base score is 9.8 out of 10.