CVE-2026-19396: ASUS RT-BE57 predictable PRNG seed in IFTTT pairing token generation

CVE-2026-19396 · Severity: info · Published 2026-10-07

The ASUS RT-BE57 router uses a predictable random number generator to create pairing tokens for IFTTT integration, allowing an unauthenticated attacker within wireless range to predict the token and gain unauthorized access to router settings. An attacker could read sensitive configuration or modify router behavior to redirect traffic or launch further attacks on the network.

Vendors: ASUS.

Quick answers

Is CVE-2026-19396 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-19396 being exploited in the wild.
How severe is CVE-2026-19396?
Informational severity, published 7 October 2026.
Which products and versions are affected?
ASUS RT-BE57.
Is there a fix for CVE-2026-19396?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-19396 attacked?
It is attacked from the adjacent network, in a network appliance.
Am I affected by CVE-2026-19396?
Check whether you run ASUS RT-BE57. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A weak PRNG seed in the IFTTT pairing token generation allows an adjacent, unauthenticated attacker to derive the pairing token by observing an administrator-initiated pairing session. The attack requires proximity to the wireless network and no credentials, and grants the attacker the ability to authenticate as the IFTTT service and read or modify router settings.

Affected products

  • ASUS RT-BE57

Timeline

  • 2026-10-07: disclosed

References

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