SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2023-35086

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U.

HIGH 7.2EPSS 38.5%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 38.5%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.

Description

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by directly using input as a format string when calling syslog in logmessage_normal function, in the do_detwan_cgi module of httpd. A remote attacker with administrator privilege can exploit this vulnerability to perform remote arbitrary code execution, arbitrary system operation or disrupt service. This issue affects RT-AX56U V2: 3.0.0.4.386_50460; RT-AC86U: 3.0.0.4_386_51529.

CVSS 3.1
7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
38.50% probability · 99th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-134
Affected
asus/rt-ac86u firmware · asus/rt-ax56u v2 firmware
Source
twcert@cert.org.tw
EPSS trend
0%20%40%3 November 2026: 38.50%3 November 20263 November 2026

EPSS 38.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.