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CVE-2018-14080: An issue was discovered on D-Link DIR-809 A1 through 1.09, A2 through 1.11, and Guest Zone through 1.09 device

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HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE

CVE-2018-14080 is a high-severity flaw (CVSS 7.5) affecting dir-809 a1 firmware, dir-809 a2 firmware, dir-809 guestzone firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on D-Link DIR-809 A1 through 1.09, A2 through 1.11, and Guest Zone through 1.09 devices. One can bypass authentication mechanisms to download the configuration file.

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.8% (top 21%)
CISA exploited listNo
WeaknessCWE-287
Published2018-10-09
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: d-link

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

d-link dir-809 a1 firmware UPGRADE
Affected: <= 1.09
Fixed in: newer than 1.09
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.
d-link dir-809 a2 firmware UPGRADE
Affected: <= 1.11
Fixed in: newer than 1.11
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.
d-link dir-809 guestzone firmware UPGRADE
Affected: <= 1.09
Fixed in: newer than 1.09
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-2018-14080?

dir-809 a1 firmware: upgrade to newer than 1.09; dir-809 a2 firmware: upgrade to newer than 1.11; dir-809 guestzone firmware: upgrade to newer than 1.09. Exact commands for each OS are on this page.

Is CVE-2018-14080 being exploited?

CVE-2018-14080 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-2018-14080 affect?

CVE-2018-14080 affects dir-809 a1 firmware, dir-809 a2 firmware, dir-809 guestzone firmware. Severity is high (CVSS 7.5). An issue was discovered on D-Link DIR-809 A1 through 1.09, A2 through 1.11, and Guest Zone through 1.09 devices. One can bypass authentication mechanisms to download the configuration file.

How urgent is CVE-2018-14080?

Priority 51/100. High severity; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

References

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