Cyber Resilience

CVE-2025-45863

CriticalPublic PoC

Published: 13 May 2025

Published
13 May 2025
Modified
23 May 2025
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0039 60.3th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-45863 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Totolink A3002R Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 39.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the macstr parameter in the formMapDelDevice interface.

CWE(s)
CWE-120

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 →
Why these techniques?

Buffer overflow vulnerability in the web interface (formMapDelDevice via macstr parameter) on the TOTOLINK router enables remote code execution, exploiting a public-facing application.

Affected Assets

totolink
a3002r firmware
4.0.0-b20230531.1404

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

References