What is the CVSS score of CVE-2025-6111?

CVE-2025-6111 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Fh1205 Firmware are affected by CVE-2025-6111?

A remote code execution vulnerability affecting Tenda FH1205 routers has been publicly disclosed with working exploits available, creating immediate risk for any organization using this equipment.

Is there a public PoC exploit available for CVE-2025-6111?

Yes, a public proof-of-concept exploit is available for CVE-2025-6111. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-6111?

Within 24 hours: Identify all Tenda FH1205 2.0.0.7(775) devices in your environment and isolate them from critical networks if possible. Within 7 days: Implement network segmentation to restrict access to these devices and enable detailed monitoring for suspicious activity. Within 30 days: Evaluate replacement options or contact Tenda for patch availability; if devices cannot be replaced, establish a long-term remediation plan with executive sponsorship.

Fh1205 Firmware CVE-2025-6111

EUVD-2025-18366 HIGH

Buffer Overflow (CWE-119)

2025-06-16 cna@vuldb.com

Buffer Overflow Tenda Fh1205 Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

EUVD ID Assigned

Mar 14, 2026 - 21:59 euvd

EUVD-2025-18366

Analysis Generated

Mar 14, 2026 - 21:59 vuln.today

PoC Detected

Jun 17, 2025 - 19:38 vuln.today

Public exploit code

CVE Published

Jun 16, 2025 - 07:15 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability classified as critical was found in Tenda FH1205 2.0.0.7(775). This vulnerability affects the function fromVirtualSer of the file /goform/VirtualSer. The manipulation of the argument page leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

Critical stack-based buffer overflow vulnerability in Tenda FH1205 firmware version 2.0.0.7(775) affecting the /goform/VirtualSer endpoint's 'page' parameter. An authenticated remote attacker can exploit this to achieve complete system compromise including arbitrary code execution, data exfiltration, and service disruption. The vulnerability has public exploit disclosure and demonstrated proof-of-concept availability, elevating immediate risk despite requiring valid credentials.

Technical ContextAI

The vulnerability exists in the fromVirtualSer function of the Tenda FH1205 router's web management interface (CPE: cpe:2.3:o:tendacn:fh1205_firmware:2.0.0.7\(775\)). The root cause is CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), specifically a stack-based buffer overflow where the 'page' parameter is insufficiently validated before being written to a fixed-size stack buffer. This is a classic memory corruption vulnerability in embedded device firmware, where unsafe C string operations (likely strcpy or similar) copy user-controlled input without bounds checking. The /goform/ endpoint pattern indicates a legacy CGI-based web interface common in consumer router firmware. Stack-based buffer overflows in router firmware are particularly severe as they typically execute with high privilege levels (root/admin) and can directly compromise device hardware and connected networks.