Description
Shenzhen Tenda Technology Co., Ltd Tenda O3v3 v1.0.0.5 was discovered to contain a stack overflow in the save_list_data parameter of the formSetCfm function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
Published: 2026-06-09
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A stack overflow occurs in the save_list_data parameter of the formSetCfm function in Tenda O3v3 firmware. The overflow is triggered by a crafted HTTP request, causing the device to crash and cease responding, which results in a loss of availability for the affected system. No impact on confidentiality or integrity is described.

Affected Systems

Shenzhen Tenda Technology Co., Ltd’s Tenda O3v3 model running firmware version 1.0.0.5 is confirmed affected; other nearby firmware releases may be impacted but are not explicitly listed.

Risk and Exploitability

The vulnerability is exploitable remotely via the web interface and can be triggered simply by sending a malicious HTTP request. The EPSS score of <1% indicates a low but non-zero exploitation probability, and the issue is not listed in CISA KEV, so no known active exploits are documented; nevertheless, the residual risk remains high for causing disruption to networked services. The CVSS score of 7.5 quantifies the severity, but the potential for widespread availability loss warrants prompt mitigation.

Generated by OpenCVE AI on June 10, 2026 at 20:07 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update the device to the latest Tenda O3v3 firmware that includes a stack buffer overflow fix.
  • Restrict external access to the web management interface using firewall rules or network segmentation so only trusted management IPs can reach the formSetCfm endpoint.
  • If a firmware update is not immediately possible, filter or block malformed HTTP requests to formSetCfm via a reverse proxy or web application firewall to reduce the likelihood of exploitation.

Generated by OpenCVE AI on June 10, 2026 at 20:07 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 10 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
Title Stack Overflow in formSetCfm Causing Denial of Service in Tenda O3v3

Wed, 10 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 10 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Tenda
Tenda o3v3
Vendors & Products Tenda
Tenda o3v3

Tue, 09 Jun 2026 22:15:00 +0000

Type Values Removed Values Added
Title Stack Overflow in formSetCfm Causing Denial of Service in Tenda O3v3
Weaknesses CWE-121

Tue, 09 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
Description Shenzhen Tenda Technology Co., Ltd Tenda O3v3 v1.0.0.5 was discovered to contain a stack overflow in the save_list_data parameter of the formSetCfm function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.
References

Subscriptions

Tenda O3v3
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-06-10T18:05:36.289Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36791

cve-icon Vulnrichment

Updated: 2026-06-10T18:03:14.516Z

cve-icon NVD

Status : Deferred

Published: 2026-06-09T19:17:44.570

Modified: 2026-06-10T18:16:45.237

Link: CVE-2026-36791

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T20:15:24Z

Weaknesses
  • CWE-121

    Stack-based Buffer Overflow