How severe is CVE-2023-34358?

CVE-2023-34358 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-34358 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34358?

CVE-2023-34358 affects Asus Rt-ax88u Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34358?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-34358 published?

CVE-2023-34358 was published on 2023-07-31 and last updated on 2026-06-17.

CVE-2023-34358

CVE-2023-34358 is a high-severity vulnerability in Asus Rt-ax88u Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Asus Rt-ax88u Firmware
Published: 2023-07-31
Last modified: 2026-06-17

Description

ASUS RT-AX88U's httpd is subject to an unauthenticated DoS condition. A remote attacker can send a specially crafted request to a device which contains a specific user agent, causing the httpd binary to crash during a string comparison performed within web.c, resulting in a DoS condition.

Frequently asked questions

What is CVE-2023-34358?: ASUS RT-AX88U's httpd is subject to an unauthenticated DoS condition. A remote attacker can send a specially crafted request to a device which contains a specific user agent, causing the httpd binary to crash during a string comparison performed within web.c, resulting in a DoS condition.
How severe is CVE-2023-34358?: CVE-2023-34358 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-34358 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34358?: CVE-2023-34358 affects Asus Rt-ax88u Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34358?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-34358 published?: CVE-2023-34358 was published on 2023-07-31 and last updated on 2026-06-17.

References

https://www.twcert.org.tw/tw/cp-132-7279-05760-1.html

Affected products (1)

cpe:2.3:o:asus:rt-ax88u_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Asus Rt-ax88u Firmware

CVE-2022-26674 — Critical (CVSS 9.8): ASUS RT-AX88U has a Format String vulnerability, which allows an unauthenticated remote attacker to write to arbitrary…
CVE-2021-41435 — Critical (CVSS 9.8): A brute-force protection bypass in CAPTCHA protection in ASUS ROG Rapture GT-AX11000, RT-AX3000, RT-AX55, RT-AX56U,…
CVE-2021-43702 — Critical (CVSS 9.0): ASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not…
CVE-2023-41349 — High (CVSS 8.8): ASUS router RT-AX88U has a vulnerability of using externally controllable format strings within its Advanced Open VPN…
CVE-2023-34360 — High (CVSS 8.2): A stored cross-site scripting (XSS) issue was discovered within the Custom User Icons functionality of ASUS RT-AX88U…
CVE-2023-34359 — High (CVSS 7.5): ASUS RT-AX88U's httpd is subject to an unauthenticated DoS condition. A remote attacker can send a specially crafted…

All CVEs affecting Asus Rt-ax88u Firmware →

Other CWE-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

Browse all CWE-125 (Out-of-bounds Read) vulnerabilities →