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CVE-2019-19825 (GCVE-0-2019-19825)

Vulnerability from cvelistv5 – Published: 2020-01-27 16:50 – Updated: 2024-08-05 02:25
VLAI Shadowserver Previdian
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
References
URL Tags
https://sploit.tech x_refsource_MISC
http://seclists.org/fulldisclosure/2020/Jan/36 mailing-listx_refsource_FULLDISC
http://packetstormsecurity.com/files/156083/Realt… x_refsource_MISC
http://seclists.org/fulldisclosure/2020/Jan/38 mailing-listx_refsource_FULLDISC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e755a59e-5b54-4bae-9e57-f74bb64bf0c2

Vulnerability ID: CVE-2019-19825

Status: Confirmed

Status Updated: 2026-07-20 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2024-02-23
Asserted: 2024-02-23
Last Seen: 2026-07-20
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Totolink / Totolink Realtek SDK based routers | Class: router | Severity: Critical (CVSS 9.8) | IoT: yes | In CISA KEV: no | Honeypot connections on 2026-07-20: 6
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 2
Iot yes
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class router
7D Avg 0
Vendor Totolink
30D Avg 2
90D Avg 3
Product Totolink Realtek SDK based routers
Cisa Kev no
Connections 6
Observation Date 2026-07-20
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-22 01:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: fb5d3f7c-ad7d-4866-b0fa-8d7ca100e3dd

Vulnerability ID: CVE-2019-19825

Status: Confirmed

Status Updated: 2025-11-27 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-11-27
Asserted: 2025-11-27
Scope
Notes: KEVIntel entry: On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the... | Affected: TOTOLINK / Realtek SDK based routers | CVSS: 9.8 (CRITICAL) | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the...
Vendor TOTOLINK
Product Realtek SDK based routers
Added Date 2025-11-27T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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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.\"},{\"lang\":\"es\",\"value\":\"En determinados enrutadores basados ??en SDK TOTOLINK Realtek, el texto CAPTCHA puede ser recuperado mediante un POST {\\\"topicurl\\\":\\\"setting/getSanvas\\\"} en el URI boafrm/formLogin, conllevando a una omisi\u00f3n de CAPTCHA. (Adem\u00e1s, el texto de CAPTCHA no es necesario una vez que el atacante ha determinado unas credenciales v\u00e1lidas. El atacante puede realizar acciones de enrutador por medio de peticiones HTTP con autenticaci\u00f3n b\u00e1sica). Esto afecta a A3002RU versiones hasta 2.0.0, A702R versiones hasta 2.1.3, N301RT versiones hasta 2.1.6 , N302R versiones hasta 3.4.0, N300RT versiones hasta 3.4.0, N200RE versiones hasta 4.0.0, N150RT versiones hasta 3.4.0 y N100RE versiones hasta 3.4.0.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:N/C:P/I:P/A:P\",\"baseScore\":7.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":10.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:a3002ru_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.0.0\",\"matchCriteriaId\":\"87EC51C9-338B-4E98-8455-069319320802\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:a3002ru:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"21945D3C-27AA-4614-8D5D-C22DE8C56F94\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:a702r_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.1.3\",\"matchCriteriaId\":\"28C67D43-7914-4AF3-9DF8-E1BF41F1AC89\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:a702r:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"49D3C58B-4632-464E-A0A6-33807E9A1842\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n301rt_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"2.1.6\",\"matchCriteriaId\":\"87A0ECEA-3FA7-4ADF-ACFA-6C4B93373DA3\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n301rt:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"EE1ED560-8B9F-40D2-AD91-6D5D4290ED79\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n302r_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"3.4.0\",\"matchCriteriaId\":\"71A22EA9-F5A5-4789-96F4-3C8600BC4848\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n302r:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D0E1D2C0-02F5-4933-9DEB-89F711052D69\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n300rt_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"3.4.0\",\"matchCriteriaId\":\"7E826FD1-C8F6-4301-972F-1B3949F59275\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n300rt:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F0581174-E6B1-4E3D-8384-7852EC53FC14\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n200re_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"4.0.0\",\"matchCriteriaId\":\"47025B3A-648B-4F89-AEA0-C76B348CBAFB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n200re:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9FF7FF59-DB13-4FEA-A81C-124048BF1676\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n150rt_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"3.4.0\",\"matchCriteriaId\":\"E096F9E2-08E5-4B44-A83A-FB659D898DB5\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n150rt:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7525BE05-F394-4ED7-B7A6-F9005EDE90D7\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:totolink:n100re_firmware:*:*:*:*:*:*:*:*\",\"versionEndIncluding\":\"3.4.0\",\"matchCriteriaId\":\"635C33EA-BEF1-4C7E-8E3A-5ED5DF79358D\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:totolink:n100re:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"30CA1251-C9EA-498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Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://seclists.org/fulldisclosure/2020/Jan/36\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2020/Jan/38\",\"source\":\"cve@mitre.org\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://sploit.tech\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]},{\"url\":\"http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Execution.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://seclists.org/fulldisclosure/2020/Jan/36\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"http://seclists.org/fulldisclosure/2020/Jan/38\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Third Party Advisory\"]},{\"url\":\"https://sploit.tech\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Third Party Advisory\"]}]}}"
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.