Cyber Resilience

CVE-2025-63469

HighPublic PoC

Published: 31 October 2025

Published
31 October 2025
Modified
05 November 2025
KEV Added
—
Patch
—
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 0.0022 44.3th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-63469 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 Application or System Exploitation (T1499.004); ranked at the 44.3th 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 ssid parameter in the sub_421BAC 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

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 SSID parameter handling enables remote attackers to crash the router firmware via crafted requests, facilitating endpoint denial of service through application exploitation.

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