---
title: "CVE-2026-19396: ASUS RT-BE57 Router - Authentication Bypass"
description: "ASUS RT-BE57 router contains a predictable seed vulnerability in the PRNG used for IFTTT pairing token generation, letting unauthenticated nearby attackers derive tokens to read or modify router settings, exploit requires proximity to observe pairing session."
url: https://panop.io/threat-heartbeat/CVE-2026-19396/
---

# CVE-2026-19396 ASUS RT-BE57 Router - Authentication Bypass

ASUS RT-BE57 router contains a predictable seed vulnerability in the PRNG used for IFTTT pairing token generation, letting unauthenticated nearby attackers derive tokens to read or modify router settings, exploit requires proximity to observe pairing session.

CVSS base score 7.7 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.13% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-19396)

## Details

Type

Authentication Bypass

Impact

Information Disclosure, Data Tampering

CVSS vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-337](https://cwe.mitre.org/data/definitions/337.html)

## Vendor fix

Update to the latest ASUS router firmware as per ASUS Security Advisory.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-19396](https://nvd.nist.gov/vuln/detail/CVE-2026-19396)
- [https://www.asus.com/security-advisory](https://www.asus.com/security-advisory)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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