CVE-2019-19825
High PUBLISHEDOn certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the...
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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.
- CVE Published
- Jan 27, 2020
- Exploitation Reported
- Nov 27, 2025
- CVSS
- 9.8 Critical
- EPSS
- 29.6%
CVE References
- 20200124 Multiple vulnerabilities in TOTOLINK and other Realtek SDK based routers seclists.org · Mailing List http://seclists.org/fulldisclosure/2020/Jan/36
- 20200131 Re: Multiple vulnerabilities in TOTOLINK and other Realtek SDK based routers seclists.org · Mailing List http://seclists.org/fulldisclosure/2020/Jan/38
- sploit.tech sploit.tech · CVE Record https://sploit.tech
- packetstormsecurity.com/files/156083/Realtek-SDK-Information-Disclos... packetstormsecurity.com · CVE Record http://packetstormsecurity.com/files/156083/Realtek-SDK-Information-D...
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| The Shadowserver First | 2025-11-27 00:00 UTC |
Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nuclei | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2019/CVE-2019-19825.yaml | Jun 01, 2026 |
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
Exploitation Status
Exploited in the wild
Recorded 2025-11-27 00:00:00 UTC · The Shadowserver
Proof of concept available
Recorded 2026-06-12 14:20:54 UTC · Nuclei Templates
Weaknesses (CWE)
-
Improper Authentication
Scanner Integrations
Nuclei, Metasploit, and other scanner references for this CVE are listed on the Detection tab.
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
nuclei · Created Unknown
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:20 UTC about 2 months ago14:20 UTC · about 2 months ago
Public PoC available
Public proof-of-concept code published
-
15:34 UTC about 2 months ago15:34 UTC · about 2 months ago
Nuclei template available
Scanner coverage available
-
00:00 UTC 8 months ago00:00 UTC · 8 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
16:50 UTC over 6 years ago16:50 UTC · over 6 years ago
CVE published
Vulnerability disclosed publicly
-
00:00 UTC over 6 years ago00:00 UTC · over 6 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2019-19825
{
"cve_id": "CVE-2019-19825",
"title": "On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrie...",
"affected_vendor": "TOTOLINK",
"affected_product": "Realtek SDK based routers",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "High",
"cvss_score": 9.8,
"epss_score": 0.29557,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}