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 ↗

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

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

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