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Vulnerability record · CVE-2025-11444 · published 8 October 2025

CVE-2025-11444: Totolink n600r firmware memory buffer overflow vulnerability

TTotolink · N600r Firmware

A security vulnerability has been detected in TOTOLINK N600R up to 4.3.0cu.7866_B20220506. This impacts the function setWiFiBasicConfig of the file /cgi-bin/cstecgi.cgi of the component HTTP Request Handler. Such manipulation of the argument wepkey leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used.

7.4 CVSS 4.0 High EPSS 1.0% · top 37.4% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
1.0%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 security vulnerability has been detected in TOTOLINK N600R up to 4.3.0cu.7866_B20220506. This impacts the function setWiFiBasicConfig of the file /cgi-bin/cstecgi.cgi of the component HTTP Request Handler. Such manipulation of the argument wepkey leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed publicly 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/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md ExploitThird Party Advisory
https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md#reproduce Exploit
https://vuldb.com/?ctiid.327381 Permissions RequiredVDB Entry
https://vuldb.com/?id.327381 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.666915 Third Party AdvisoryVDB Entry
https://www.totolink.net/ Product
https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md ExploitThird Party Advisory
https://github.com/z472421519/BinaryAudit/blob/main/PoC/BOF/TOTOLINK/wepkey/wepkey.md#reproduce Exploit

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Related vulnerabilities

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

9.8CVE-2025-51390Totolink n600r firmware os command injection vulnerabilityTOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a command injection vulnerability via the pin parameter in the setWiFiWpsConfig func…EPSS 1.8%9.8CVE-2025-46060Totolink n600r firmware classic buffer overflow vulnerabilityBuffer Overflow vulnerability in TOTOLINK N600R v4.3.0cu.7866_B2022506 allows a remote attacker to execute arbitrary code via the UPLOAD_FILENAME com…EPSS 0.97%9.8CVE-2025-22900Totolink n600r firmware stack-based buffer overflow vulnerabilityTotolink N600R v4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the macCloneMac parameter in the setWanConfig function.EPSS 0.55%9.8CVE-2023-43141Totolink a3700r firmware improper access control vulnerabilityTOTOLINK A3700R V9.1.2u.6134_B20201202 and N600R V5.3c.5137 are vulnerable to Incorrect Access Control.EPSS 0.79%9.8CVE-2022-29391Totolink n600r firmware out-of-bounds write vulnerabilityTOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the comment parameter in the function FUN_004200c8.EPSS 1.7%9.8CVE-2022-29392Totolink n600r firmware out-of-bounds write vulnerabilityTOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the comment parameter in the function FUN_00418c24.EPSS 1.7%9.8CVE-2022-29393Totolink n600r firmware out-of-bounds write vulnerabilityTOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the comment parameter in the function FUN_004192cc.EPSS 1.7%9.8CVE-2022-29394Totolink n600r firmware out-of-bounds write vulnerabilityTOTOLINK N600R V4.3.0cu.7647_B20210106 was discovered to contain a stack overflow via the macAddress parameter in the function FUN_0041b448.EPSS 1.7%

Source: NIST National Vulnerability Database (record CVE-2025-11444), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.