Home/CVE/It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is
CVE

CVE-2023-39240

It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is

It is identified a format string vulnerability in ASUS RT-AX56U V2’s iperf client function API. This vulnerability is caused by lacking validation for a specific value within its set_iperf3_cli.cgi module. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service.

HIGH · CVSS 7.2 EPSS 0.01128
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-134Use of Externally-Controlled Format String
▤

Affected Products & Versions

3
asus rt-ax55 firmwareall versions
asus rt-ax56u v2 firmwareall versions
asus rt-ac86u firmwareall versions
▣

Scoring & Timeline

7.2
HIGH · CVSS v3.1 · twcert@cert.org.tw
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Sep 2023 · 08:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.twcert.org.tw/tw/cp-132-7356-021bf-1.htmlThird Party Advisory
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