Cyber Resilience

CVE-2025-63466

HighPublic PoC

Published: 31 October 2025

Published
31 October 2025
Modified
05 November 2025
KEV Added
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Patch
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CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0024 46.7th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-63466 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Totolink Lr350 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 46.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Totolink LR350 v9.3.5u.6369_B20220309 was discovered to contain a stack overflow via the password parameter in the sub_426EF8 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

CWE(s)
CWE-121

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Stack overflow in router web interface via crafted password parameter enables exploitation of public-facing application (T1190) to cause application crash and denial of service (T1499.004).

Affected Assets

totolink
lr350 firmware
9.3.5u.6369_b20220309

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References