CVE-2023-47678Network attack vector

Unauthenticated file read and write via TFTP

Published Nov 15, 2023 · Updated Aug 27, 2024

Improper access control in ASUSTeK RT-AC87U all versions allows remote attackers to read or write unintended files through TFTP. ASUSTeK has not published which TFTP handler or authorization check fails; the record establishes only that access restrictions are not enforced. Network reachability to the TFTP service is sufficient, with no authentication or user interaction required, affecting file confidentiality and integrity but not availability.

CVSS severity9.1
Critical
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in ASUSTeK RT-AC87U all versions allows remote attackers to read or write unintended files through TFTP. ASUSTeK has not published which TFTP handler or authorization check fails; the record establishes only that access restrictions are not enforced. Network reachability to the TFTP service is sufficient, with no authentication or user interaction required, affecting file confidentiality and integrity but not availability.

The record

CVE
CVE-2023-47678
Published
Nov 15, 2023
Updated
Aug 27, 2024
Vendor
ASUSTeK Computer Inc.
Product
RT-AC87U
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ASUSTeK Computer Inc. · RT-AC87Uversion=all versions
ASUSTeK Computer Inc. · ASUS RT-AC87U Firmwareversion=0 <*

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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

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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