Cyber Resilience

CVE-2025-46060

CriticalPublic PoC

Published: 13 June 2025

Published
13 June 2025
Modified
16 June 2025
KEV Added
—
Patch
—
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 0.0211 84.5th percentile
Risk Priority 21 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-46060 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Totolink N600R 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 15.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

CVE-2025-46060 is a buffer overflow vulnerability, tracked under CWE-120, that affects the TOTOLINK N600R router running firmware version 4.3.0cu.7866_B2022506. The flaw resides in the UPLOAD_FILENAME component and carries a CVSS 3.1 base score of 9.8, reflecting network-accessible, unauthenticated exploitation that can fully compromise confidentiality, integrity, and availability.

A remote attacker can supply a crafted upload filename to trigger the overflow and execute arbitrary code on the device without requiring credentials or user interaction. The attack is possible over the network with low complexity, enabling complete takeover of the affected router.

The provided references point to the vendor site and a public GitHub repository containing technical details, but no official patch or mitigation guidance is described in the available information. The associated EPSS score remains low, with a current value of 0.0211 and a peak of 0.0213, indicating limited observed exploitation interest to date.

EU & UK References

Vulnerability details

Buffer Overflow vulnerability in TOTOLINK N600R v4.3.0cu.7866_B2022506 allows a remote attacker to execute arbitrary code via the UPLOAD_FILENAME component

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 in web CGI interface (cstecgi.cgi) via UPLOAD_FILENAME enables remote arbitrary code execution on public-facing router application.

Affected Assets

totolink
n600r firmware
4.3.0cu.7866_b2022506

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