CVE-2026-19586: A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to op

Q: How do I fix CVE-2026-19586?

er7212pc firmware: upgrade to 2.4.3; er605 firmware: upgrade to 2.4.4; er605w firmware: upgrade to 2.0.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-19586 being exploited?

CVE-2026-19586 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-2026-19586 affect?

CVE-2026-19586 affects er7212pc firmware, er605 firmware, er605w firmware. Severity is critical (CVSS 9.8). A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to operate as an OpenVPN Server due to insufficient validation of client-supplied data during OpenVPN connection establishment. An unau

Q: How urgent is CVE-2026-19586?

Priority 71/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2026-19586 is a critical-severity flaw (CVSS 9.8) affecting er7212pc firmware, er605 firmware, er605w firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to operate as an OpenVPN Server due to insufficient validation of client-supplied data during OpenVPN connection establishment. An unauthenticated remote attacker may provide specially crafted input influencing backend command execution logic before authentication completes. Exploitation requires the OpenVPN Server feature to be enabled, VPN s

Why this priority

Critical severity
EPSS top 7%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.7% (top 7%)
CISA exploited list	No
Weakness	CWE-78
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 er605w firmware UPGRADE

Affected: < 2.0.4

Fixed in: 2.0.4

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.

Exact fixes by distribution

Fedora 46 · flare-im · FIXED · 0.22.7-1.fc46 · FEDORA-2026-cd5e8062a1 · source

sudo dnf upgrade --advisory=FEDORA-2026-cd5e8062a1

Fedora ELN · libdnf · FIXED · 0.76.0-2.eln159 · FEDORA-2026-dbd263e9d4 · source

sudo dnf upgrade --advisory=FEDORA-2026-dbd263e9d4

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: mattgsys/CVE-2026-19586 (2 stars)
Write-up: mattg.systems/posts/cve-2026-19586/

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-2026-19586?

er7212pc firmware: upgrade to 2.4.3; er605 firmware: upgrade to 2.4.4; er605w firmware: upgrade to 2.0.4. Exact commands for each OS are on this page.

Is CVE-2026-19586 being exploited?

CVE-2026-19586 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-2026-19586 affect?

CVE-2026-19586 affects er7212pc firmware, er605 firmware, er605w firmware. Severity is critical (CVSS 9.8). A pre-authentication OS command injection vulnerability has been identified in Omada gateways configured to operate as an OpenVPN Server due to insufficient validation of client-supplied data during OpenVPN connection establishment. An unau

How urgent is CVE-2026-19586?

Priority 71/100. Critical severity; EPSS top 7%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

TP-Link vulnerabilities · OpenVPN vulnerabilities

Related CVEs

CVE-2026-19683 HIGH 7.4 UPGRADE UPGRADE A vulnerability exists in the Dynamic DNS (DDNS) functionality of TP-Link Omada Gateways
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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