CVE-2026-19396 Weak cryptography in Router
An attacker can derive pairing tokens due to a predictable PRNG seed, allowing unauthorized reading and modification of router settings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19396?
CVE-2026-19396 is a high-severity vulnerability in ASUS Router, published on 7 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-337
Which versions are affected by CVE-2026-19396?
How do I fix CVE-2026-19396?
No fix has been published for CVE-2026-19396 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19396 being exploited?
There is no known exploitation of CVE-2026-19396 in the wild and no public exploit code.
Sources
Also known as GHSA-fcpg-rqrm-22xm.