CVE-2026-19683: A vulnerability exists in the Dynamic DNS (DDNS) functionality of TP-Link Omada Gateways

Q: How do I fix CVE-2026-19683?

er7212pc firmware: upgrade to 2.4.3; er605 firmware: upgrade to 2.4.4; er7206 firmware: upgrade to 2.3.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-19683 being exploited?

CVE-2026-19683 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-19683 affect?

CVE-2026-19683 affects er7212pc firmware, er605 firmware, er7206 firmware. Severity is high (CVSS 7.4). 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 obse

Q: How urgent is CVE-2026-19683?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.4REMOTEUPGRADEUPGRADEUPGRADE

CVE-2026-19683 is a high-severity flaw (CVSS 7.4) affecting er7212pc firmware, er605 firmware, er7206 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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, c

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-319
Published	2026-08-20
Last modified	2026-10-26

Publisher (CNA): TPLink · Vendor: tp-link

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-20 19:16 UTCPublished CVE record published
2026-10-26 10:10 UTCUpdated Record last modified

tp-link er7212pc firmware UPGRADE

Affected: < 2.4.3

Fixed in: 2.4.3

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

tp-link er605 firmware UPGRADE

Affected: < 2.4.4

Fixed in: 2.4.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

tp-link er7206 firmware UPGRADE

Affected: < 2.3.5

Fixed in: 2.3.5

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

tp-link er7406 firmware UPGRADE

Affected: < 1.3.4

Fixed in: 1.3.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

tp-link er707-m2 firmware UPGRADE

Affected: < 1.4.4

Fixed in: 1.4.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

tp-link er7412-m2 firmware UPGRADE

Affected: < 1.2.0

Fixed in: 1.2.0

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-19683?

er7212pc firmware: upgrade to 2.4.3; er605 firmware: upgrade to 2.4.4; er7206 firmware: upgrade to 2.3.5. Exact commands for each OS are on this page.

Is CVE-2026-19683 being exploited?

CVE-2026-19683 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-19683 affect?

CVE-2026-19683 affects er7212pc firmware, er605 firmware, er7206 firmware. Severity is high (CVSS 7.4). 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 obse

How urgent is CVE-2026-19683?

Priority 38/100. High severity; Remotely exploitable, no login, no user action

Software pages

TP-Link vulnerabilities

Related CVEs

CVE-2026-19586 CRITICAL 9.8 UPGRADE UPGRADE A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to op
CVE-2026-9033 MEDIUM 4.3 UPGRADE UPGRADE An unauthenticated attacker with network access to the captive portal service of an affected device can termin

References

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