CVE-2019-19825

9.8 CRITICAL 30% exploit odds No fix listed Auth & access Network gear

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 29.6% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2019-12-16 00:00 UTC ReservedThe CVE id was reserved by its CNA
2020-01-27 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 02:27 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 29.6% in the next 30 days (EPSS).
Severity: 9.8 CRITICAL (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2020-01-27 17:15 UTC
Last modified: 2026-06-17 02:27 UTC
Exploit probability: 29.6% · EPSS, next 30 days
Weakness: CWE-287 · Improper authentication
Record status: Modified

Affected

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

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

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

Is it in your code?

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References

NVD record · CVE.org record