Which versions of 520w Firmware are affected by CVE-2025-14140?

Organizations using A vulnerability should be aware of notable risk from CVE-2025-14140, a buffer overflow vulnerability rated CVSS 6.5.

Is there a public PoC exploit available for CVE-2025-14140?

Yes, a public proof-of-concept exploit is available for CVE-2025-14140. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-14140?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

520w Firmware CVE-2025-14140

Q: What is the CVSS score of CVE-2025-14140?

CVE-2025-14140 has a CVSS 4.0 base score of 5.7 (Medium). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.1%.

EUVD-2025-201553 MEDIUM

Buffer Overflow (CWE-119)

2025-12-06 cna@vuldb.com

Buffer Overflow 520w Firmware Utt

5.7

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.7 MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.5 (MEDIUM) 5.7 (MEDIUM)

EUVD ID Assigned

Mar 15, 2026 - 17:37 euvd

EUVD-2025-201553

Analysis Generated

Mar 15, 2026 - 17:37 vuln.today

PoC Detected

Dec 12, 2025 - 12:42 vuln.today

Public exploit code

CVE Published

Dec 06, 2025 - 16:15 cve.org

MEDIUM 5.7

CVE Published

Dec 06, 2025 - 16:15 nvd

MEDIUM 6.5

DescriptionCVE.org

A vulnerability was detected in UTT 进取 520W 1.7.7-180627. The affected element is the function strcpy of the file /goform/websHostFilter. Performing manipulation of the argument addHostFilter results in buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Buffer overflow in UTT 520W firmware version 1.7.7-180627 allows remote authenticated attackers to cause a denial of service via crafted input to the addHostFilter parameter in the websHostFilter endpoint. Exploit code is publicly available, but no active exploitation in the wild has been confirmed.