What is the CVSS score of CVE-2026-2907?

CVE-2026-2907 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-2026-2907?

A high-severity vulnerability (CVSS 8.8) in Tenda HG9 devices allows unauthenticated attackers to exploit the GPON configuration endpoint, potentially compromising network infrastructure and customer…

Is there a public PoC exploit available for CVE-2026-2907?

Yes, a public proof-of-concept exploit is available for CVE-2026-2907. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2907?

Within 24 hours: Inventory all Tenda HG9 devices (model 300001138) and isolate affected units from production networks if operationally feasible. Within 7 days: Implement network segmentation to restrict access to the GPON configuration endpoint (/boaform/formgponConf) to authorized administrators only; deploy WAF rules to block suspicious requests to this endpoint. Within 30 days: Contact Tenda for patch availability and timeline; evaluate replacement of affected devices with patched alternatives or from vendors with active security support if patch remains unavailable.

Hg9 Firmware CVE-2026-2907

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 - 20:21 vuln.today

Public exploit code

CVE Published

Feb 22, 2026 - 02:16 nvd

HIGH 8.8

DescriptionCVE.org

A weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. This manipulation of the argument fmgpon_loid/fmgpon_loid_password causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.

AnalysisAI

Remote code execution in Tenda HG9 firmware via stack buffer overflow in the GPON configuration endpoint allows authenticated attackers to achieve full system compromise through manipulation of LOID parameters. Public exploit code exists for this vulnerability, increasing the risk of active exploitation in deployed devices. No patch is currently available, making network segmentation and access controls critical for mitigation.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Hg9 Firmware. A weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. This manipulation of the argument fmgpon_loid/fmgpon_loid_password causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could 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.