CVE-2026-82539
TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruption
- State
- Published
- Severity
- 9.4 Critical
- Published
- Aug 30, 2026
- Updated
- Sep 1, 2026
- Reserved
- Aug 29, 2026
Description
A vulnerability was determined in TOTOLINK A720R 4.1.5cu.630_B20250509. This impacts the function setMacFilterRules of the file cstecgi.cgi of the component MAC Filtering. Executing a manipulation of the argument desc can lead to memory corruption. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P | VulDB |
| 3.1 | 9.1 Critical | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 3.0 | 9.1 Critical | CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R | VulDB |
| 2.0 | 8.3 High | AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
- CWE-119 Memory Corruption
Affected Products
| Product | Versions |
|---|---|
A720RTOTOLINK |
|
References
- VDB-397055 | TOTOLINK A720R MAC Filtering cstecgi.cgi setMacFilterRules memory corruptionvdb-entrytechnical-description
- VDB-397055 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-82539 | CVE Analysis and Reportthird-party-advisory
- Submit #888696 | TOTOLINK A720R V4.1.5cu.630_B20250509 Buffer Overflowthird-party-advisory
- https://github.com/Xernary/CVE-2026-82539exploit
- https://www.totolink.net/product
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