CVE-2019-7642: D-Link routers with the mydlink feature have some web interfaces without authentication requirements
58
This week
HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE
CVE-2019-7642 is a high-severity flaw (CVSS 7.5) affecting dir-817lw firmware, dir-816l firmware, dir-816 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
D-Link routers with the mydlink feature have some web interfaces without authentication requirements. An attacker can remotely obtain users' DNS query logs and login logs. Vulnerable targets include but are not limited to the latest firmware versions of DIR-817LW (A1-1.04), DIR-816L (B1-2.06), DIR-816 (B1-2.06?), DIR-850L (A1-1.09), and DIR-868L (A1-1.10).
Why this priority
High severity
Public exploit reference
Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
dlink dir-817lw firmware MITIGATE
Affected: 1.04
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.04
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.
dlink dir-816l firmware MITIGATE
Affected: 2.06
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.06
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.
dlink dir-816 firmware MITIGATE
Affected: 2.06
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.06
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.
dlink dir-850l firmware MITIGATE
Affected: 1.09
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.09
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.
dlink dir-868l firmware MITIGATE
Affected: 1.10
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10
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 sourceNVD · 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-2019-7642?
dir-817lw firmware: mitigate or apply the listed mitigation; dir-816l firmware: mitigate or apply the listed mitigation; dir-816 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2019-7642 being exploited?
CVE-2019-7642 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-2019-7642 affect?
CVE-2019-7642 affects dir-817lw firmware, dir-816l firmware, dir-816 firmware. Severity is high (CVSS 7.5). D-Link routers with the mydlink feature have some web interfaces without authentication requirements. An attacker can remotely obtain users' DNS query logs and login logs. Vulnerable targets include but are not limited to the latest firmwar
How urgent is CVE-2019-7642?
Priority 58/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action
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