CVE-2022-26674Network attack vector

Unauthenticated code execution via externally controlled formatting

Published Apr 22, 2022 · Updated Sep 16, 2024

A format-string flaw in ASUS RT-AX88U firmware before 3.0.0.4.386.4606 allows remote attackers to execute arbitrary code. Externally controlled formatting permits writes to arbitrary memory addresses, but public sources identify no affected handler, parameter, or formatting call. No authentication or user interaction is required; successful exploitation grants arbitrary router control or crashes the service.

CVSS severity9.8
Critical
EPSS probability2.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A format-string flaw in ASUS RT-AX88U firmware before 3.0.0.4.386.4606 allows remote attackers to execute arbitrary code. Externally controlled formatting permits writes to arbitrary memory addresses, but public sources identify no affected handler, parameter, or formatting call. No authentication or user interaction is required; successful exploitation grants arbitrary router control or crashes the service.

The record

CVE
CVE-2022-26674
Published
Apr 22, 2022
Updated
Sep 16, 2024
Vendor
ASUSTeK Computer Inc.
Product
RT-AX88U
Classifications
CWE-134, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <3.0.0.4.386.4606

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ASUSTeK Computer Inc. · RT-AX88Uversion=unspecified <3.0.0.4.386.4606

Published CVSS scores

9.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-134Use of Externally-Controlled Format String
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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