CVE-2026-7749
Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow
- State
- Published
- Severity
- 8.7 High
- Published
- May 4, 2026
- Updated
- May 5, 2026
- Reserved
- May 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulDB |
| 3.1 | 8.8 High | 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 | VulDB |
| 3.0 | 8.8 High | 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 | VulDB |
| 2.0 | 9.0 High | AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
N300RHTotolink |
|
References
- VDB-360924 | Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflowvdb-entrytechnical-description
- VDB-360924 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #807203 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflowthird-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setWanConfig-34553a41781f80ed8500d9b8d54074f2exploit
- https://www.totolink.net/product
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