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EPSS 0.1%top 74%

CVE-2026-6121: Stack-based Buffer Overflow in Tenda F451

0
High
VulnerabilityCVE-2026-6121cvecve-2026-6121
Published: Sun Apr 12 2026 (04/12/2026, 07:15:13 UTC)
Source: CVE Database V5
Vendor/Project: Tenda
Product: F451

Description

CVE-2026-6121 is a high-severity stack-based buffer overflow vulnerability in Tenda F451 version 1. 0. 0. 7. It exists in the httpd component's WrlclientSet function, specifically in the /goform/WrlclientSet endpoint. The vulnerability is triggered by manipulation of the GO argument, allowing remote attackers to cause a buffer overflow. An exploit has been published, but no official patch or remediation guidance is currently available from the vendor.

CVSS v4.0

Score 8.7high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 04/20/2026, 06:34:50 UTC

Technical Analysis

This vulnerability affects Tenda F451 firmware version 1.0.0.7, where the WrlclientSet function in the httpd service improperly handles the GO argument, leading to a stack-based buffer overflow. The flaw can be exploited remotely without user interaction or privileges, as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:N). The vulnerability has a CVSS 4.0 base score of 8.7, reflecting high impact on confidentiality, integrity, and availability. Although an exploit is publicly available, no official fix or patch has been released by Tenda as of the published date.

Potential Impact

Successful exploitation of this vulnerability may allow remote attackers to execute arbitrary code or cause denial of service on affected devices. The high CVSS score reflects significant potential impact on the device's confidentiality, integrity, and availability. Since the vulnerability is remotely exploitable without user interaction, affected devices are at elevated risk if exposed to untrusted networks.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the absence of an official fix, affected users should consider restricting network access to the vulnerable device, especially blocking access to the /goform/WrlclientSet endpoint from untrusted sources. Monitor vendor channels for updates or patches addressing this vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
VulDB
Date Reserved
2026-04-11T16:03:25.689Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 69db4a6682d89c981f186e50

Added to database: 4/12/2026, 7:31:50 AM

Last enriched: 4/20/2026, 6:34:50 AM

Last updated: 5/27/2026, 10:44:58 AM

Views: 86

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