Public proof of concept

CVE-2023-35086

A public proof of concept exists; no exploitation attested.

Published2023-07-21
WeaknessCWE-134

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2023-07-2107:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-35086?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-35086?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP · NVD

Asus rt-ac86u

Branch	Affected	Fixed in	Source
3.0	= 3.0.0.4_386_51529	no fix published	CISA-ADP

Asus rt-ac86u firmwareversion to verify

Branch	Affected	Fixed in	Source
3.0	= 3.0.0.4_386_51529	no fix published	NVD

Asus rt-ax56u v2

Branch	Affected	Fixed in	Source
3.0	= 3.0.0.4.386_50460	no fix published	CISA-ADP

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedtin-z/CVE-2023-35086-POC

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2024-10-24
OpenCVESSVC decisionnone—
CNACVSS 3.17.2read 2026-10-23
CNAweakness (CWE)CWE-134read 2026-10-23
FIRST EPSSEPSS score38.5 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 2023-07-21
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-35086?

Is CVE-2023-35086 actively exploited?

Active exploitation of CVE-2023-35086 has not been confirmed. Its EPSS score was 38.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-35086?

CVE-2023-35086 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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