high Known exploitedREV. 01

CVE-2023-39780ASUS RT-AX55 — command injection in the traffic rules page

The affected router firmware (ASUS RT-AX55 3.0.0.4.386.51598) runs commands out of a request to its bandwidth rules page, for anyone already signed in to the web interface.

YOUR NEXT MOVE

Update the router firmware now and change the administrator password; exploit code is public and this interface is often left facing the internet.

Read the risk

THE VITAL STATS
CVSS score
8.8/ 10
CVSS v3.1
EPSS probability
40%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2023-09-11
Added to KEV
2025-06-02
Exploit published
Yes
Confidence
high
Kill chain
execution
MITRE ATT&CK
T1059
Severity
high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attacker needsA valid login on the router's web interface.

Behind the card

5 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2023-39780 · CRDS 0.1 · Issued 2026-09-24