ASUS RT-AX88U - externally-controlled format string

published 2023-09-18 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-45852

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 58%
public exploits: 0; none known

ASUS router RT-AX88U has a vulnerability of using externally controllable format strings within its Advanced Open VPN function. An authenticated remote attacker can exploit the exported OpenVPN configuration to execute an externally-controlled format string attack, resulting in sensitivity information leakage, or forcing the device to reset and permanent denial of service.

Patch / fix

fixed in 1

ASUS RT-AX88U 3.0.0.4_388_23748

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 y ago (2024-09-25)

Exploit prediction

0.86% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

ASUS RT-AX88U

Classification

Weakness

CWE-134 Use of Externally-Controlled Format String

References

twcert.org.tw /tw/cp-132-7371-aecf1-1.html
third-party-advisory

Sources

CVE List CVE-2023-41349
NVD CVE-2023-41349

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary