← Vulnerability feed

Vulnerability record · CVE-2025-6400 · published 21 June 2025

CVE-2025-6400: Totolink n300rh firmware memory buffer overflow vulnerability

TTotolink · N300rh Firmware

A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101 and classified as critical. Affected by this issue is some unknown functionality of the file /boafrm/formPortFw of the component HTTP POST Message Handler. The manipulation of the argument service_type leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

7.4 CVSS 4.0 High EPSS 0.96% · top 40.0% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References, 3 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101 and classified as critical. Affected by this issue is some unknown functionality of the file /boafrm/formPortFw of the component HTTP POST Message Handler. The manipulation of the argument service_type leads to buffer overflow. The attack may be launched 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/d2pq/cve/blob/main/616/20.md ExploitThird Party Advisory
https://github.com/d2pq/cve/blob/main/616/20.md#poc ExploitThird Party Advisory
https://vuldb.com/?ctiid.313394 Permissions RequiredThird Party AdvisoryVDB Entry
https://vuldb.com/?id.313394 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.597687 Third Party AdvisoryVDB Entry
https://www.totolink.net/ Product
https://github.com/d2pq/cve/blob/main/616/20.md ExploitThird Party Advisory

Track CVE-2025-6400 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

8.9CVE-2026-3301Totolink n300rh firmware command injection vulnerabilityA security flaw has been discovered in Totolink N300RH 6.1c.1353_B20190305. Affected by this vulnerability is the function setWebWlanIdx of the file …EPSS 4.5%5.5CVE-2026-3696Totolink n300rh firmware command injection vulnerabilityA vulnerability was found in Totolink N300RH 6..1c.1353_B20190305. The affected element is the function setWiFiWpsConfig of the file /cgi-bin/cstecgi…EPSS 2.9%5.3CVE-2025-4851Totolink n300rh firmware injection vulnerabilityA vulnerability classified as critical was found in TOTOLINK N300RH 6.1c.1390_B20191101. This vulnerability affects the function setUploadUserData of…EPSS 1.5%5.3CVE-2025-4849Totolink n300rh firmware injection vulnerabilityA vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101. It has been rated as critical. Affected by this issue is the function CloudACMunual…EPSS 1.5%5.3CVE-2025-4850Totolink n300rh firmware injection vulnerabilityA vulnerability classified as critical has been found in TOTOLINK N300RH 6.1c.1390_B20191101. This affects the function setUnloadUserData of the file…EPSS 1.2%2.0CVE-2025-6401Totolink n300rh firmware improper resource shutdown vulnerabilityA vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101. It has been classified as problematic. This affects an unknown part of the file /bo…EPSS 0.55%9.5CVE-2026-88772Citrix netscaler application delivery controller memory buffer overflow vulnerabilityVulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 F…KEV8.8CVE-2026-8452Citrix NetScaler ADC and Gateway memory buffer overflow causes DoSCVE-2026-8452 is a memory buffer overflow (CWE-119) in Citrix NetScaler ADC and NetScaler Gateway that leads to unpredictable or erroneous behavior a…KEVEPSS 1.0%analysed

Source: NIST National Vulnerability Database (record CVE-2025-6400), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.