Free and open · new CVEs checked every 20 minutesStatusRSSOpen dataContact

CVE-2018-9285: Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900,

62
This week
CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2018-9285 is a critical-severity flaw (CVSS 9.8) affecting rt-ac66u firmware, rt-ac68u firmware, rt-ac86u firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and RT-AC3100 devices before 3.0.0.4.384_10007; RT-N18U devices before 3.0.0.4.382.39935; RT-AC87U and RT-AC3200 devices before 3.0.0.4.382.50010; and RT-AC5300 devices before 3.0.0.4.384.20287 allows OS command injection via the pingCNT and destIP fields of the SystemCmd variable.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance3.6% (top 11%)
CISA exploited listNo
WeaknessCWE-78
Published2018-04-04
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: asus

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

asus rt-ac66u firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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.
asus rt-ac68u firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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.
asus rt-ac86u firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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.
asus rt-ac88u firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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.
asus rt-ac1900 firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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.
asus rt-ac2900 firmware UPGRADE
Affected: < 3.0.0.4.384.10007
Fixed in: 3.0.0.4.384.10007
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-2018-9285?

rt-ac66u firmware: upgrade to 3.0.0.4.384.10007; rt-ac68u firmware: upgrade to 3.0.0.4.384.10007; rt-ac86u firmware: upgrade to 3.0.0.4.384.10007. Exact commands for each OS are on this page.

Is CVE-2018-9285 being exploited?

CVE-2018-9285 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-2018-9285 affect?

CVE-2018-9285 affects rt-ac66u firmware, rt-ac68u firmware, rt-ac86u firmware. Severity is critical (CVSS 9.8). Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U, RT-AC1900, RT-AC2900, and RT-AC3100 devices before 3.0.0.4.384_10007; RT-N18U devices before 3.0.0.4.382.39935; RT-AC87U and RT-AC3200 devices before 3.

How urgent is CVE-2018-9285?

Priority 62/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

References

← Back to latest CVEs

Get the weekly exploited-CVE digest by emailThe CVEs being attacked this week and how to fix them. No spam, unsubscribe any time.