CVE-2026-19812
TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow
- State
- Published
- Severity
- 8.7 High
- Published
- Aug 14, 2026
- Updated
- Aug 14, 2026
- Reserved
- Aug 14, 2026
Description
A weakness has been identified in TOTOLINK A800R 4.1.2cu.5137_B20200730. This affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component product.so. This manipulation of the argument File causes stack-based buffer overflow. The attack is possible to be carried out 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 |
|---|---|
A800RTOTOLINK |
|
References
- VDB-389948 | TOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflowvdb-entrytechnical-description
- VDB-389948 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-19812 | CVE Analysis and Reportthird-party-advisory
- Submit #869428 | Totolink A800R V4.1.2cu.5137_B20200730 Buffer Overflowthird-party-advisory
- https://github.com/panda666-888/vuls/blob/main/totolink/a800r/UploadCustomModule.mdexploit
- https://www.totolink.net/product
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