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Vulnerability record · CVE-2025-7420 · published 11 July 2025

CVE-2025-7420: Tenda o3 firmware memory buffer overflow vulnerability

Tenda · O3 Firmware

A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been declared as critical. This vulnerability affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. The manipulation of the argument extChannel leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

7.4 CVSS 4.0 High EPSS 0.82% · top 44.5% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
7.4CVSS 4.0 base score, v2 9.0
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been declared as critical. This vulnerability affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. The manipulation of the argument extChannel leads to stack-based buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_53/53.md ExploitThird Party Advisory
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_53/53.md#poc ExploitThird Party Advisory
https://vuldb.com/?ctiid.315880 Permissions Required
https://vuldb.com/?id.315880 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.608866 Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/ Product
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_53/53.md ExploitThird Party Advisory
https://github.com/wudipjq/my_vuln/blob/main/Tenda3/vuln_53/53.md#poc ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-55613Tenda o3 firmware classic buffer overflow vulnerabilityTenda O3V2 1.0.0.12(3880) is vulnerable to Buffer Overflow in the fromSafeSetMacFilter function via the mac parameter.EPSS 0.56%9.8CVE-2024-36604Tenda o3 firmware command injection vulnerabilityTenda O3V2 v1.0.0.12(3880) was discovered to contain a Blind Command Injection via stpEn parameter in the SetStp function. This vulnerability allows …EPSS 2.0%8.7CVE-2024-7152Tenda o3 firmware stack-based buffer overflow vulnerabilityA vulnerability was found in Tenda O3 1.0.0.10(2478). It has been rated as critical. This issue affects the function fromSafeSetMacFilter of the file…EPSS 1.3%8.7CVE-2024-7151Tenda o3 firmware stack-based buffer overflow vulnerabilityA vulnerability was found in Tenda O3 1.0.0.10(2478). It has been declared as critical. This vulnerability affects the function fromMacFilterSet of t…EPSS 1.1%7.4CVE-2025-7421Tenda o3 firmware memory buffer overflow vulnerabilityA vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the fil…EPSS 0.82%7.4CVE-2025-7422Tenda o3 firmware memory buffer overflow vulnerabilityA vulnerability classified as critical has been found in Tenda O3V2 1.0.0.12(3880). Affected is the function setAutoReboot of the file /goform/setNet…EPSS 0.82%7.4CVE-2025-7423Tenda o3 firmware memory buffer overflow vulnerabilityA vulnerability classified as critical was found in Tenda O3V2 1.0.0.12(3880). Affected by this vulnerability is the function formWifiMacFilterSet of…EPSS 0.82%7.4CVE-2025-7419Tenda o3 firmware memory buffer overflow vulnerabilityA vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been classified as critical. This affects the function fromSpeedTestSet of the file /g…EPSS 0.82%

Source: NIST National Vulnerability Database (record CVE-2025-7420), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.