CVE-2019-19825

Name: CVE-2019-19825
Creator: NVD / NIST
Published: 2020-01-27T17:15:12.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 29.56%

Last modified Jun 17, 2026

CVE-2019-19825 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 29.56% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

29.56%

98.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Totolink	A3002ru Firmware	<= 2.0.0
Totolink	A702r Firmware	<= 2.1.3
Totolink	N301rt Firmware	<= 2.1.6
Totolink	N302r Firmware	<= 3.4.0
Totolink	N300rt Firmware	<= 3.4.0
Totolink	N200re Firmware	<= 4.0.0
Totolink	N150rt Firmware	<= 3.4.0
Totolink	N100re Firmware	<= 3.4.0

References

http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Execution.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Jan/36Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Jan/38Mailing List, Third Party Advisory
https://sploit.techExploit, Third Party Advisory
http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclosure-Code-Execution.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2020/Jan/36Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Jan/38Mailing List, Third Party Advisory
https://sploit.techExploit, Third Party Advisory

Timeline

Published: Jan 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19825?

How severe is CVE-2019-19825?

CVE-2019-19825 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 29.56% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19825?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19825?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST