On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an…
Priority HIGH 65CWE-287Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-287.
Summary
On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the boafrm/formLogin URI, leading to a CAPTCHA bypass. (Also, the CAPTCHA text is not needed once the attacker has determined valid credentials. The attacker can perform router actions via HTTP requests with Basic Authentication.) This affects A3002RU through 2.0.0, A702R through 2.1.3, N301RT through 2.1.6, N302R through 3.4.0, N300RT through 3.4.0, N200RE through 4.0.0, N150RT through 3.4.0, and N100RE through 3.4.0.
Why it matters now
EPSS 0.29557 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 16
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:totolink:a3002ru_firmware:*:*:*:*:*:*:*:* | up to 2.0.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:a702r_firmware:*:*:*:*:*:*:*:* | up to 2.1.3 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:n301rt_firmware:*:*:*:*:*:*:*:* | up to 2.1.6 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n301rt:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:n302r_firmware:*:*:*:*:*:*:*:* | up to 3.4.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n302r:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:n300rt_firmware:*:*:*:*:*:*:*:* | up to 3.4.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n300rt:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
- cpe:2.3:o:totolink:a3002ru_firmware:*:*:*:*:*:*:*:* Versions up to 2.0.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:a702r_firmware:*:*:*:*:*:*:*:* Versions up to 2.1.3 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:n301rt_firmware:*:*:*:*:*:*:*:* Versions up to 2.1.6 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n301rt:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:n302r_firmware:*:*:*:*:*:*:*:* Versions up to 3.4.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n302r:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:n300rt_firmware:*:*:*:*:*:*:*:* Versions up to 3.4.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n300rt:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
Show 6 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:totolink:n200re_firmware:*:*:*:*:*:*:*:* | up to 4.0.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n200re:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:n150rt_firmware:*:*:*:*:*:*:*:* | up to 3.4.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n150rt:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
| cpe:2.3:o:totolink:n100re_firmware:*:*:*:*:*:*:*:* | up to 3.4.0 | Vulnerable | TOTOLINK |
| cpe:2.3:h:totolink:n100re:-:*:*:*:*:*:*:* | not specified by NVD | Running on | TOTOLINK |
- cpe:2.3:o:totolink:n200re_firmware:*:*:*:*:*:*:*:* Versions up to 4.0.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n200re:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:n150rt_firmware:*:*:*:*:*:*:*:* Versions up to 3.4.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n150rt:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK
- cpe:2.3:o:totolink:n100re_firmware:*:*:*:*:*:*:*:* Versions up to 3.4.0 Vulnerable ·TOTOLINK
- cpe:2.3:h:totolink:n100re:-:*:*:*:*:*:*:* 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-2019-19825
- 2026-10-03 Alias added: GHSA-qx9v-3w62-8wqf
References
Exploit 1
More TOTOLINK A3002ru Firmware vulnerabilities
- TI-2024-22621 TOTOLINK AC1200 Wireless Router A3002RU V2.1.1-B20230720.1011 is vulnerable to Buffer… CVSS 3.1CRITICAL 9.8
- TI-2026-21376 TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer… CVSS 3.1HIGH 8.8
- TI-2026-21374 TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer… CVSS 3.1HIGH 8.8
- TI-2025-06323 TOTOLINK A3002RU HTTP POST Request formParentControl buffer overflow CVSS 4.0HIGH 8.7
- TI-2025-06309 TOTOLINK A3002RU HTTP POST Request formWlSiteSurvey buffer overflow CVSS 4.0HIGH 8.7
- TI-2025-05794 TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow CVSS 4.0HIGH 8.7
Sources
- CVE-2019-19825 · CVE Program
- CVE-2019-19825 · NVD
- FIRST EPSS
- GHSA-qx9v-3w62-8wqf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences