TI-2023-17557 Aliases CVE-2023-35087 GHSA-4qh3-vw22-fpq6

ASUS RT-AX56U V2 & RT-AC86U - Format String - 2

MEDIUM 51CWE-134Published 2023-07-21 · Updated 2024-10-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-134 and the CVSS impact.

Summary

It is identified a format string vulnerability in ASUS RT-AX56U V2 & RT-AC86U. This vulnerability is caused by lacking validation for a specific value when calling cm_processChangedConfigMsg in ccm_processREQ_CHANGED_CONFIG function in AiMesh system. An unauthenticated remote attacker can exploit this vulnerability without privilege 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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01069 65th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
ASUS	RT-AX56U V2	3.0.0.4.386_50460	—	No fix listed	CNA
ASUS	RT-AC86U	3.0.0.4_386_51529	—	No fix listed	CNA

RT-AX56U V2 VendorASUS Affected 3.0.0.4.386_50460 Fixed in — No fix listed CNA
RT-AC86U VendorASUS Affected 3.0.0.4_386_51529 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:asus:rt-ac86u_firmware:3.0.0.4_386_51529:::::::*	3.0.0.4_386_51529	Vulnerable	ASUS
cpe:2.3:h:asus:rt-ac86u:-:::::::*	not specified by NVD	Running on	ASUS
cpe:2.3:o:asus:rt-ax56u_v2_firmware:3.0.0.4.386_50460:::::::*	3.0.0.4.386_50460	Vulnerable	ASUS
cpe:2.3:h:asus:rt-ax56u_v2:-:::::::*	not specified by NVD	Running on	ASUS

cpe:2.3:o:asus:rt-ac86u_firmware:3.0.0.4_386_51529:*:*:*:*:*:*:* Versions 3.0.0.4_386_51529 Vulnerable ·ASUS
cpe:2.3:h:asus:rt-ac86u:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ASUS
cpe:2.3:o:asus:rt-ax56u_v2_firmware:3.0.0.4.386_50460:*:*:*:*:*:*:* Versions 3.0.0.4.386_50460 Vulnerable ·ASUS
cpe:2.3:h:asus:rt-ax56u_v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ASUS

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-35087
2026-10-03 Alias added: GHSA-4qh3-vw22-fpq6

References

Advisory 1

https://www.twcert.org.tw/tw/cp-132-7249-ab2d1-1.html

TI-2023-17556 ASUS RT-AX56U V2 & RT-AC86U - Format String -1 CVSS 3.1HIGH 7.2
TI-2021-02220 In ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware <… CVSS 3.1HIGH 7.5
TI-2018-06370 ASUS RT-AC51U, RT-AC58U, RT-AC66U, RT-AC1750, RT-ACRH13, and RT-N12 D1 routers with… CVSS 3.0CRITICAL 9.8
TI-2018-06731 Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U… CVSS 3.0CRITICAL 9.8
TI-2023-20391 ASUS RT-AC86U - Command injection vulnerability - 5 CVSS 3.1HIGH 8.8
TI-2023-20390 ASUS RT-AC86U - Command injection vulnerability - 4 CVSS 3.1HIGH 8.8

See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences