CVE-2026-7748

HIGH

Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow

Title source: cna
STIX 2.1

Description

A weakness has been identified in Totolink N300RH 3.2.4-B20220812. Affected by this issue is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument FileName can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

References (5)

Core 5
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-360923 | Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow
https://vuldb.com/vuln/360923
Signature, Permissions Required signature permissions-required
VDB-360923 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/360923/cti
Third Party Advisory third-party-advisory
Submit #807202 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflow
https://vuldb.com/submit/807202
Product product
https://www.totolink.net/

Scores

CVSS v3 8.8
EPSS 0.0009
EPSS Percentile 24.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-119 CWE-120
Status published
Products (1)
Totolink/N300RH 3.2.4-B20220812
Published May 04, 2026
Tracked Since May 04, 2026