TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow
Priority HIGH 73CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
A vulnerability was found in TOTOLINK A702R, A3002R, A3002RU and EX1200T 3.0.0-B20230809.1615/4.0.0-B20230531.1404/4.0.0-B20230721.1521/4.1.2cu.5232_B20210713. It has been classified as critical. Affected is an unknown function of the file /boafrm/formIPv6Addr of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01046 64th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD and the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| TOTOLINK | A702R | 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 | — | No fix listed | CNA |
| TOTOLINK | A3002R | 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 | — | No fix listed | CNA |
| TOTOLINK | A3002RU | 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 | — | No fix listed | CNA |
| TOTOLINK | EX1200T | 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 | — | No fix listed | CNA |
- A702R VendorTOTOLINK Affected 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 Fixed in — No fix listed CNA
- A3002R VendorTOTOLINK Affected 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 Fixed in — No fix listed CNA
- A3002RU VendorTOTOLINK Affected 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 Fixed in — No fix listed CNA
- EX1200T VendorTOTOLINK Affected 3.0.0-B20230809.1615; 4.0.0-B20230531.1404; 4.0.0-B20230721.1521; 4.1.2cu.5232_B20210713 Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:totolink:a3002ru_firmware:3.0.0-b20230809.1615:*:*:*:*:*:*:* | 3.0.0-b20230809.1615 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:a3002r_firmware:4.0.0-b20230531.1404:*:*:*:*:*:*:* | 4.0.0-b20230531.1404 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a3002r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:a702r_firmware:4.0.0-b20230721.1521:*:*:*:*:*:*:* | 4.0.0-b20230721.1521 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5232_b20210713:*:*:*:*:*:*:* | 4.1.2cu.5232_b20210713 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:ex1200t:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
- cpe:2.3:o:totolink:a3002ru_firmware:3.0.0-b20230809.1615:*:*:*:*:*:*:* Versions 3.0.0-b20230809.1615 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:a3002r_firmware:4.0.0-b20230531.1404:*:*:*:*:*:*:* Versions 4.0.0-b20230531.1404 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a3002r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:a702r_firmware:4.0.0-b20230721.1521:*:*:*:*:*:*:* Versions 4.0.0-b20230721.1521 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5232_b20210713:*:*:*:*:*:*:* Versions 4.1.2cu.5232_b20210713 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:ex1200t:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-6393
- 2026-10-03 Alias added: GHSA-6xw8-jh6q-85g8
References
More TOTOLINK A3002r Firmware vulnerabilities
- TI-2025-35057 TOTOLINK-A3002R v4.0.0-B20230531.1404 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8
- TI-2025-28880 TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the… CVSS 3.1CRITICAL 9.8
- TI-2025-28878 TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the… CVSS 3.1CRITICAL 9.8
- TI-2025-28876 TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a buffer overflow via the… CVSS 3.1CRITICAL 9.8
- TI-2025-28874 TOTOLINK A3002R v4.0.0-B20230531.1404 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8
- TI-2025-19054 TOTOLINK A3002R V4.0.0-B20230531.1404 is vulnerable to Command Injection in /bin/boa via bandstr. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2025-6393 · CVE Program
- CVE-2025-6393 · NVD
- FIRST EPSS
- GHSA-6xw8-jh6q-85g8 · GitHub Advisory Database · CC BY 4.0
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