CVE-2026-7748
Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow
- State
- Published
- Severity
- 8.7 High
- Published
- May 4, 2026
- Updated
- May 4, 2026
- Reserved
- May 3, 2026
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.
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-360923 | Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflowvdb-entrytechnical-description
- VDB-360923 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #807202 | Totolink N300RH N300RH V3_Firmware V3.2.4-B20220812 Buffer Overflowthird-party-advisory
- https://lavender-bicycle-a5a.notion.site/TOTOLINK-N300RH-setUpgradeFW-34553a41781f80abb1d1c627d7ff4329?pvs=73exploitpatch
- https://www.totolink.net/product
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