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Rt Ax88u FirmwareOperating system · Asus

CVE-2022-26674

CRITICAL · 9.8 CVSS v3.1 Published 2022-04-22
Fix available
A fix is available. Upgrade to 3.0.0.4.386.46065 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
ASUS RT-AX88U has a Format String vulnerability, which allows an unauthenticated remote attacker to write to arbitrary memory address and perform remote arbitrary code execution, arbitrary system operation or disrupt service.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

ASUS RT-AX88U routers contain a format string vulnerability that allows unauthenticated remote attackers to write to arbitrary memory addresses. By exploiting the improper handling of user-supplied format strings in the firmware, an attacker can achieve remote code execution, execute arbitrary system operations, or cause denial of service.

MitigationApply the latest vendor firmware update from ASUS for the RT-AX88U. If an update is unavailable, restrict remote access to the router's management interface to trusted networks only.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Rt Ax88u FirmwareOperating system
Affected:< 3.0.0.4.386.46065

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Confirm router model is RT-AX88U
    Access the router web interface or check the device label. The vulnerability only affects the RT-AX88U model.
    Affected if Router is an ASUS RT-AX88U device
  2. Check installed firmware version
    Log into the router web interface (typically at 192.168.1.1), navigate to Administration > Firmware Upgrade or Advanced Settings > System > Firmware Version. Compare the displayed version to 3.0.0.4.386.46065.
    Affected if Firmware version is lower than 3.0.0.4.386.46065 (e.g., 3.0.0.4.386.xxxxx or earlier)
  3. Verify remote management access is enabled
    In the router web interface, check under Administration > System > Remote Access Configuration or Advanced > WAN > DDNS. Look for settings like 'Enable Web Access from WAN' or 'Allow remote management'.
    Affected if Remote management or web access from WAN is enabled and the router is internet-facing

You are affected if you own an RT-AX88U router with firmware below 3.0.0.4.386.46065 and have remote management accessible from the internet.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.0.0.4.386.46065 or later
Fixed in 3.0.0.4.386.46065
Interim mitigation

Apply the latest vendor firmware update from ASUS for the RT-AX88U. If an update is unavailable, restrict remote access to the router's management interface to trusted networks only.

Recommended fix High confidence

ASUS RT-AX88U Firmware 3.0.0.4.386.46065 or later

  1. 1. Access the ASUS RT-AX88U router web interface by navigating to router.asus.com or the router's IP address (typically 192.168.1.1)
  2. 2. Log in with administrator credentials
  3. 3. Navigate to 'Administration' > 'Firmware Upgrade'
  4. 4. Select 'Manual Firmware Update'
  5. 5. Download the firmware version 3.0.0.4.386.46065 or later from the official ASUS support site (https://www.asus.com/networking-iot-servers/wifi-routers/asus-wifi-routers/rt-ax88u/helpdesk_download/)
  6. 6. Click 'Upload' to select the downloaded firmware file
  7. 7. Wait for the upload and flashing process to complete (do not power off the router)
  8. 8. The router will automatically reboot after the upgrade; log back in and verify the firmware version under 'Administration' > 'Firmware Upgrade'
Caveat Router firmware upgrades may reset custom configurations to defaults; back up current settings before upgrading if possible

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Rt Ax88u Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,984.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-26674 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data