What is the CVSS score of CVE-2026-2906?

CVE-2026-2906 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: 0.1%.

Which versions of Hg9 Firmware are affected by CVE-2026-2906?

A high-severity vulnerability (CVE-2026-2906) affecting Tenda HG9 devices has been publicly disclosed with no patch currently available.

Is there a public PoC exploit available for CVE-2026-2906?

Yes, a public proof-of-concept exploit is available for CVE-2026-2906. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2906?

Within 24 hours: Inventory all Tenda HG9 devices in your environment and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict access to the vulnerable /boaform/formSamba endpoint and monitor for exploitation attempts. Within 30 days: Contact Tenda for patch availability and develop a replacement strategy for devices that cannot be patched; consider deploying alternative network management solutions.

Hg9 Firmware CVE-2026-2906

HIGH

Buffer Overflow (CWE-119)

2026-02-22 cna@vuldb.com

Buffer Overflow Stack Overflow Hg9 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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:04 vuln.today

PoC Detected

Feb 23, 2026 - 20:22 vuln.today

Public exploit code

CVE Published

Feb 22, 2026 - 02:16 nvd

HIGH 8.8

DescriptionCVE.org

A security flaw has been discovered in Tenda HG9 300001138. Affected is an unknown function of the file /boaform/formSamba of the component Samba Configuration Endpoint. The manipulation of the argument sambaCap results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

AnalysisAI

Remote code execution in Tenda HG9 firmware via stack buffer overflow in the Samba configuration endpoint allows authenticated attackers to achieve complete system compromise through manipulation of the sambaCap parameter. Public exploit code exists for this vulnerability, increasing the risk of active exploitation. No patch is currently available.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Hg9 Firmware. A security flaw has been discovered in Tenda HG9 300001138. Affected is an unknown function of the file /boaform/formSamba of the component Samba Configuration Endpoint. The manipulation of the argument sambaCap results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.