High Cryptography

CVE-2026-19683 — Unencrypted Credential Transmission in Omada Gateway Dynamic DNS Authentication in Omada Gateways

A vulnerability exists in the Dynamic DNS (DDNS) functionality of TP-Link Omada Gateways. During communication with a third-party DDNS service, authentication credentials are transmitted over an unencrypted channel. An attacker who can observe or manipulate traffic between an affected device and the DDNS service may obtain sensitive authentication information or interfere with DDNS update operations. Exploitation requires DDNS to be configured, communication with an external DDNS service, and attacker visibility or control of the relevant network path. Successful exploitation may result in disclosure of DDNS account credentials, unauthorized access to DDNS management functionality, or modification of DNS records associated with the affected deployment.

Published Aug 20, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: TPLink

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

TP-Link Systems Inc.

Dr3150 Firmware and 36 more

CVSS base

7.4

High · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (TP-Link Systems Inc. Dr3150 Firmware, TP-Link Systems Inc. DR3150 v1, TP-Link Systems Inc. Dr3220v-4g Firmware…).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (cryptography), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
TP-Link Systems Inc.	Dr3150 Firmware	< 1.0.1	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	DR3150 v1	< 1.0.1 Build 20260722 Rel.16854	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Dr3220v-4g Firmware	< 1.2.0	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	DR3220v-4G v1	< 1.2.0 Build 20260630 Rel.82652	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Dr3650v Firmware	< 1.2.0	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	DR3650v v1	< 1.2.0 Build 20260630 Rel.83311	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Dr3650v-4g Firmware	< 1.2.0	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	DR3650v-4G v1	< 1.2.0 Build 20260630 Rel.83347	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er603wp-4g-outdoor Firmware	< 1.0.2	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER603WP-4G-Outdoor v1	< 1.0.2 Build 20260723 Rel.43271	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er605 Firmware	< 2.4.4	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER605 v2	< 2.4.4 Build 20260630 Rel.14398	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er605w Firmware	< 2.0.4	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER605W v2	< 2.0.4 Build 20260723 Rel.43763	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er701-5g-outdoor Firmware	< 1.0.3	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER701-5G-Outdoor v1	< 1.0.3 Build 20260723 Rel.40931	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er703wp-4g-outdoor Firmware	< 1.1.7	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER703WP-4G-Outdoor v1	< 1.1.7 Build 20260723 Rel.41712	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er706w Firmware	< 1.2.11	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER706W v1	< 1.2.11 Build 20260723 Rel.41567	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er706w-4g Firmware	< 2.1.11< 1.2.6	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER706W-4G v2	< 2.1.11 Build 20260723 Rel.41624	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er706wp-4g Firmware	< 1.1.11	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER706WP-4G v1	< 1.1.11 Build 20260723 Rel.41624	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er707-m2 Firmware	< 1.4.4	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER707-M2 v1	< 1.4.4 Build 20260625 Rel.43063	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er7206 Firmware	< 2.3.5	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER7206 v2	< 2.3.5 Build 20260625 Rel.43136	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er7212pc Firmware	< 2.4.3	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER7212PC v2	< 2.4.3 Build 20260722 Rel.40250	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er7406 Firmware	< 1.3.4	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER7406 v1	< 1.3.4 Build 20260625 Rel.43136	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er7412-m2 Firmware	< 1.2.0	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER7412-M2 v1	< 1.2.0 Build 20260630 Rel.82947	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	Er8411 Firmware	< 1.4.1	Vulnerable	NIST National Vulnerability Database
TP-Link Systems Inc.	ER8411 v1	< 1.4.1 Build 20260708 Rel.64832	Vulnerable	CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc.	V1	< 1.2.6 Build 20260723 Rel.41321	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.3	CVSS 4.0	Medium	—	—	f23511db-6c3e-4e32-a477-6aa17d310630 via NIST National Vulnerability Database
6.3	CVSS 4.0	Medium	—	—	TPLink via CVE Program (cve.org) e CISA ADP
7.4	CVSS 3.1	High	2.2	5.2	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-319 · Cleartext Transmission of Sensitive Information

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Check TLS negotiations and unexpected certificates in the component’s traffic.

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · tp-link systems inc./er7212pc v2, tp-link systems inc./er605 v2, tp-link systems inc./er7206 v2, tp-link systems inc/er7
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.4
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 20, 2026 · TPLink

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

3 on the record

www.tp-link.com/us/support/faq/5256/
Vendor Advisory, vendor-advisory, NIST National Vulnerability Database
www.omadanetworks.com/us/support/download/
Product, patch, NIST National Vulnerability Database
www.omadanetworks.com/en/support/download/
Product, patch, NIST National Vulnerability Database

Elsewhere on this site

TP-Link Systems Inc.
every CVE for this vendor

Cryptography
same class

CWE-319
other pages naming this weakness

Related CVEs (same products)

Medium CVE-2026-9033 Unauthenticated Captive Portal Session Termination and Forced Logout in Omada Gateways Aug 20, 2026
Critical CVE-2026-19586 Pre-Authentication OS Command Injection in Omada Gateways on OpenVPN Server in Omada Gateways Aug 20, 2026
Medium CVE-2025-9290 Authentication Weakness on Omada Controllers, Gateways and Access Points Jan 22, 2026
Critical CVE-2025-6542 OS command injection in multiple parameters Oct 20, 2025
High CVE-2025-7850 Authenticated OS command execution Oct 20, 2025
Critical CVE-2025-7851 Unauthorized root access via debug functionality Oct 20, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-19683 is "Unencrypted Credential Transmission in Omada Gateway Dynamic DNS Authentication in Omada Gateways", rated High. It affects Dr3150 Firmware (TP-Link Systems Inc.); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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