What is CVE-2022-26673?

CVE-2022-26673 is a medium-severity vulnerability in ASUS Rt-Ax88u, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-04-22.

How severe is CVE-2022-26673?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2022-26673 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in ASUS Rt-Ax88u

CVE-2022-26673

ASUS RT-AX88U has insufficient filtering for special characters in the HTTP header parameter. A remote attacker with general user privilege can exploit this vulnerability to inject JavaScript and perform Stored Cross-Site Scripting (XSS) attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-04-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.3th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

ASUS Rt-Ax88u — versions unspecified
ASUS Rt-Ax88u Firmware

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

karimhabush/cyberowl

References

www.twcert.org.tw/tw/cp-132-6042-6cc0f-1.html (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2022-26673?: CVE-2022-26673 is a medium-severity vulnerability in ASUS Rt-Ax88u, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-04-22.
How severe is CVE-2022-26673?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2022-26673 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.