What is CVE-2025-63469?

CVE-2025-63469 is a high-severity vulnerability in Totolink Lr350, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-10-31.

How severe is CVE-2025-63469?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Totolink Lr350

CVE-2025-63469

Totolink LR350 v9.3.5u.6369_B20220309 was discovered to contain a stack overflow via the ssid parameter in the sub_421BAC function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Vulnerability class: Buffer Overflow

Published 2025-10-31 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.004 (30.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 30th percentile — 30.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Totolink Lr350
Totolink Lr350 Firmware — versions 9.3.5u.6369_b20220309

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/LR350/5/1.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-63469?: CVE-2025-63469 is a high-severity vulnerability in Totolink Lr350, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2025-10-31.
How severe is CVE-2025-63469?: High severity. CVSS v3 base score is 7.5 out of 10.