CVE-2026-7749

Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow

Published May 4, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Totolink n300rh
Vendors & Products Totolink n300rh
Type Values Removed Values Added
Description A security vulnerability has been detected in Totolink N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
Title Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow
First Time appeared Totolink
Totolink n300rh Firmware
Weaknesses CWE-119
CWE-120
CPEs cpe:2.3:o:totolink:n300rh_firmware:*:*:*:*:*:*:*:*
Vendors & Products Totolink
Totolink n300rh Firmware
References
Metrics cvssV2_0

{'score': 9, 'vector': 'AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 8.8, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
May 5, 2026, 12:59 AM
Reserved
May 3, 2026, 5:20 PM
Status
Deferred
Published
May 4, 2026, 10:16 AM
Modified
Oct 26, 2026, 7:10 PM