---
id: CVE-2026-19396
title: "A predictable seed in the pseudo-random number generator (PRNG) in the IFTTT pairing token generation of the ASUS RT-BE57 router allows an unauthenticated nearby user to\_derive\_the pairing token and read or modify router settings via obs…"
summary: "A predictable seed in the pseudo-random number generator (PRNG) in the IFTTT pairing token generation of the ASUS RT-BE57 router allows an unauthenticated nearby user to\_derive\_the pairing token and read or modify router settings via obs…"
severity: high
cvss: 7.7
cvssVector: 'CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cwe:
  - CWE-337
vendor: ASUS
product: Router
affected:
  - Router 3.0.0.6_102 series
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T19:17:36.380'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19396'
references:
  - url: 'https://www.asus.com/security-advisory'
    label: 54bf65a7-a193-42d2-b1ba-8e150d3c35e1
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-07T18:38:34.062384Z'
cvssSource: cna
ingestedAt: '2026-10-07T02:28:07.549Z'
epss: 0.00127
epssPercentile: 0.02062
---

## Overview

A predictable seed in the pseudo-random number generator (PRNG) in the IFTTT pairing token generation of the ASUS RT-BE57 router allows an unauthenticated nearby user to derive the pairing token and read or modify router settings via observed values from an administrator-initiated IFTTT pairing session.Refer to the ' Security Update for ASUS Router Firmware  ' section on the ASUS Security Advisory for more information.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.